| Monday, April 3 |
| » Defeated Mariners (0-1), 3-2 | Oakland-Alameda County Stadium (1-0) | 1-0 | |
| » W: Dave Stewart (1-0) L: Mark Langston (0-1) S: Dennis Eckersley (1) | First | -- |
| » Major-league debuts: Omar Vizquel (Mariners) |
| Wednesday, April 5 |
| » Defeated Mariners (0-2), 11-1 | Oakland-Alameda County Stadium (2-0) | 2-0 | Won 2 |
| » W: Bob Welch (1-0) L: Scott Bankhead (0-1) | First | -- |
| Thursday, April 6 |
| » Defeated Mariners (0-3), 11-3 | Oakland-Alameda County Stadium (3-0) | 3-0 | Won 3 |
| » W: Storm Davis (1-0) L: Mike Campbell (0-1) S: Todd Burns (1) | First | -- |
| Friday, April 7 |
| » Lost to White Sox (3-1), 7-1 | Oakland-Alameda County Stadium (3-1) | 3-1 | |
| » W: Bill Long (1-0) L: Curt Young (0-1) S: Barry Jones (1) | First | -- |
| » Major-league debuts: Jeff Schaefer (White Sox) |
| Saturday, April 8 |
| » Lost to White Sox (4-1), 7-4 | Oakland-Alameda County Stadium (3-2) | 3-2 | Lost 2 |
| » W: Melido Perez (1-0) L: Mike Moore (0-1) S: Bobby Thigpen (1) | Third | 1 out |
| Sunday, April 9 |
| » Defeated White Sox (4-2), 4-2 | Oakland-Alameda County Stadium (4-2) | 4-2 | |
| » W: Dave Stewart (2-0) L: Jerry Reuss (1-1) S: Dennis Eckersley (2) | Second | ½ out |
| Monday, April 10 |
| » Defeated Angels (3-4), 4-0 | Anaheim Stadium (1-0) | 5-2 | Won 2 |
| » W: Bob Welch (2-0) L: Chuck Finley (1-1) | Second | ½ out |
| Tuesday, April 11 |
| » Lost to Angels (4-4), 7-1 | Anaheim Stadium (1-1) | 5-3 | |
| » W: Bert Blyleven (1-0) L: Storm Davis (1-1) | Fourth | 1 out |
| Wednesday, April 12 |
| » Lost to Angels (5-4), 5-0 | Anaheim Stadium (1-2) | 5-4 | Lost 2 |
| » W: Kirk McCaskill (2-0) L: Curt Young (0-2) | Fourth | 2 out |
| Thursday, April 13 |
| » Defeated Angels (5-5), 5-0 | Anaheim Stadium (2-2) | 6-4 | |
| » W: Mike Moore (1-1) L: Jim Abbott (0-2) | Fourth | 2 out |
| Friday, April 14 |
| » Defeated White Sox (5-5), 7-4 | Comiskey Park I (1-0) | 7-4 | Won 2 |
| » W: Dave Stewart (3-0) L: Melido Perez (1-1) | Second | 2 out |
| Saturday, April 15 |
| » Lost to White Sox (6-5), 7-4 | Comiskey Park I (1-1) | 7-5 | |
| » W: Jerry Reuss (2-1) L: Bob Welch (2-1) S: Bobby Thigpen (3) | Third | 3 out |
| Sunday, April 16 |
| » Defeated White Sox (6-6), 3-2 | Comiskey Park I (2-1) | 8-5 | |
| » W: Dennis Eckersley (1-0) L: Eric King (0-3) | Second | 3 out |
| Monday, April 17 |
| » Lost to Mariners (5-8), 7-2 | Kingdome (0-1) | 8-6 | |
| » W: Erik Hanson (2-1) L: Curt Young (0-3) | Fourth | 3 out |
| Tuesday, April 18 |
| » Defeated Mariners (5-9), 5-3 | Kingdome (1-1) | 9-6 | |
| » W: Eric Plunk (1-0) L: Jerry Reed (1-2) S: Dennis Eckersley (3) | Fourth | 3 out |
| Wednesday, April 19 |
| » Defeated Mariners (5-10), 7-5 | Kingdome (2-1) | 10-6 | Won 2 |
| » W: Dave Stewart (4-0) L: Mark Langston (2-2) S: Dennis Eckersley (4) | Second | 3 out |
| Friday, April 21 |
| » Defeated Angels (9-7), 10-6 | Oakland-Alameda County Stadium (5-2) | 11-6 | Won 3 |
| » W: Bob Welch (3-1) L: Chuck Finley (2-2) S: Rick Honeycutt (1) | Second | 2 out |
| Saturday, April 22 |
| » Defeated Angels (9-8), 4-3 | Oakland-Alameda County Stadium (6-2) | 12-6 | Won 4 |
| » W: Curt Young (1-3) L: Bert Blyleven (2-1) S: Dennis Eckersley (5) | Second | 1 out |
| Sunday, April 23 |
| » Defeated Angels (9-9), 2-0 | Oakland-Alameda County Stadium (7-2) | 13-6 | Won 5 |
| » W: Mike Moore (2-1) L: Kirk McCaskill (3-1) S: Dennis Eckersley (6) | Second | 1 out |
| Monday, April 24 |
| » Defeated Blue Jays (8-11), 5-4 | Oakland-Alameda County Stadium (8-2) | 14-6 | Won 6 |
| » W: Gene Nelson (1-0) L: Tom Henke (1-2) | Second | 1½ out |
| Tuesday, April 25 |
| » Defeated Blue Jays (8-12), 3-1 | Oakland-Alameda County Stadium (9-2) | 15-6 | Won 7 |
| » W: Storm Davis (2-1) L: John Cerutti (0-1) S: Dennis Eckersley (7) | Second | 1½ out |
| Wednesday, April 26 |
| » Lost to Orioles (11-9), 2-1 | Oakland-Alameda County Stadium (9-3) | 15-7 | |
| » W: Jose Bautista (2-2) L: Bob Welch (3-2) S: Gregg Olson (2) | Second | 1½ out |
| Thursday, April 27 |
| » Defeated Orioles (11-10), 9-4 | Oakland-Alameda County Stadium (10-3) | 16-7 | |
| » W: Todd Burns (1-0) L: Mark Thurmond (0-1) | Second | 2 out |
| Friday, April 28 |
| » Defeated Tigers (7-13), 2-1 | Oakland-Alameda County Stadium (11-3) | 17-7 | Won 2 |
| » W: Mike Moore (3-1) L: Paul Gibson (1-1) S: Dennis Eckersley (8) | Second | 2½ out |
| Saturday, April 29 |
| » Defeated Tigers (7-14), 3-2 | Oakland-Alameda County Stadium (12-3) | 18-7 | Won 3 |
| » W: Dave Stewart (5-0) L: Doyle Alexander (3-1) | Second | 2 out |
| Sunday, April 30 |
| » Lost to Tigers (8-14), 7-2 | Oakland-Alameda County Stadium (12-4) | 18-8 | |
| » W: Frank Tanana (2-3) L: Storm Davis (2-2) S: Willie Hernandez (5) | Second | 2 out |
| Tuesday, May 2 |
| » Defeated Blue Jays (9-17), 8-5 | Exhibition Stadium (1-0) | 19-8 | |
| » W: Rick Honeycutt (1-0) L: Duane Ward (1-4) S: Eric Plunk (1) | Second | 1½ out |
| Wednesday, May 3 |
| » Lost to Blue Jays (10-17), 2-0 | Exhibition Stadium (1-1) | 19-9 | |
| » W: Mike Flanagan (2-1) L: Mike Moore (3-2) | Second | 1½ out |
| » Major-league debuts: Junior Felix (Blue Jays) |
| Friday, May 5 |
| » Defeated Tigers (8-18), 5-3 | Tiger Stadium (1-0) | 20-9 | |
| » W: Dave Stewart (6-0) L: Frank Tanana (2-4) S: Dennis Eckersley (9) | First | -- |
| Saturday, May 6 |
| » Lost to Tigers (9-18), 6-3 | Tiger Stadium (1-1) | 20-10 | |
| » W: Jack Morris (1-6) L: Storm Davis (2-3) S: Willie Hernandez (6) | First | -- |
| Sunday, May 7 |
| » Defeated Tigers (9-19), 5-4 | Tiger Stadium (2-1) | 21-10 | |
| » W: Bob Welch (4-2) L: Charles Hudson (0-3) S: Dennis Eckersley (10) | First | -- |
| Monday, May 8 |
| » Defeated Orioles (13-17), 6-1 | Memorial Stadium (1-0) | 22-10 | Won 2 |
| » W: Mike Moore (4-2) L: Bob Milacki (1-3) | First | -- |
| Thursday, May 11 |
| » Lost to Orioles (14-17), 6-2 | Memorial Stadium (1-1) | 22-11 | |
| » W: Jeff Ballard (6-1) L: Dave Stewart (6-1) | First | -- |
| Friday, May 12 |
| » Defeated Brewers (14-18), 5-4 | Oakland-Alameda County Stadium (13-4) | 23-11 | |
| » W: Todd Burns (2-0) L: Dan Plesac (1-2) | First | -- |
| Saturday, May 13 |
| » Defeated Brewers (14-19), 4-3 | Oakland-Alameda County Stadium (14-4) | 24-11 | Won 2 |
| » W: Bob Welch (5-2) L: Chris Bosio (5-2) S: Dennis Eckersley (11) | First | -- |
| Former Athletic Al Reiss dies in Red Bank, NJ at the age of 81. |
| Sunday, May 14 |
| » Lost to Brewers (15-19), 2-1 | Oakland-Alameda County Stadium (14-5) | 24-12 | |
| » W: Chuck Crim (2-2) L: Mike Moore (4-3) S: Dan Plesac (6) | First | -- |
| Monday, May 15 |
| » Defeated Brewers (15-20), 12-2 | Oakland-Alameda County Stadium (15-5) | 25-12 | |
| » W: Dave Stewart (7-1) L: Don August (2-5) | First | -- |
| Tuesday, May 16 |
| » Lost to Yankees (18-19), 3-2 | Oakland-Alameda County Stadium (15-6) | 25-13 | |
| » W: Clay Parker (1-0) L: Curt Young (1-4) S: Dave Righetti (6) | First | -- |
| Wednesday, May 17 |
| » Defeated Yankees (18-20), 8-3 | Oakland-Alameda County Stadium (16-6) | 26-13 | |
| » W: Storm Davis (3-3) L: Richard Dotson (1-1) S: Dennis Eckersley (12) | First | -- |
| Thursday, May 18 |
| » Defeated Yankees (18-21), 6-2 | Oakland-Alameda County Stadium (17-6) | 27-13 | Won 2 |
| » W: Bob Welch (6-2) L: Tommy John (2-7) S: Todd Burns (2) | First | -- |
| Friday, May 19 |
| » Lost to Red Sox (19-19), 7-4 | Oakland-Alameda County Stadium (17-7) | 27-14 | |
| » W: Bob Stanley (2-1) L: Gene Nelson (1-1) | First | -- |
| » Major-league debuts: Dick Scott (Athletics) |
| Saturday, May 20 |
| » Defeated Red Sox (19-20), 6-3 | Oakland-Alameda County Stadium (18-7) | 28-14 | |
| » W: Dave Stewart (8-1) L: Wes Gardner (1-4) S: Dennis Eckersley (13) | First | -- |
| Sunday, May 21 |
| » Defeated Red Sox (19-21), 5-4 | Oakland-Alameda County Stadium (19-7) | 29-14 | Won 2 |
| » W: Todd Burns (3-0) L: Roger Clemens (5-3) S: Dennis Eckersley (14) | First | -- |
| Tuesday, May 23 |
| » Lost to Brewers (18-24), 9-1 | County Stadium (0-1) | 29-15 | |
| » W: Chris Bosio (6-3) L: Bob Welch (6-3) | First | -- |
| Wednesday, May 24 |
| » Defeated Brewers (18-25), 6-2 | County Stadium (1-1) | 30-15 | |
| » W: Mike Moore (5-3) L: Mike Birkbeck (0-3) | First | -- |
| Thursday, May 25 |
| » Lost to Brewers (19-25), 4-1 | County Stadium (1-2) | 30-16 | |
| » W: Bryan Clutterbuck (2-1) L: Dave Stewart (8-2) S: Dan Plesac (9) | First | -- |
| Friday, May 26 |
| » Defeated Yankees (21-24), 4-0 | Yankee Stadium (1-0) | 31-16 | |
| » W: Todd Burns (4-0) L: Andy Hawkins (4-6) | First | -- |
| Saturday, May 27 |
| » Defeated Yankees (21-25), 3-0 | Yankee Stadium (2-0) | 32-16 | Won 2 |
| » W: Curt Young (2-4) L: Dave LaPoint (5-3) S: Rick Honeycutt (2) | First | -- |
| Sunday, May 28 |
| » Defeated Yankees (21-26), 4-3 | Yankee Stadium (3-0) | 33-16 | Won 3 |
| » W: Mike Moore (6-3) L: Clay Parker (2-1) S: Rick Honeycutt (3) | First | -- |
| Monday, May 29 |
| » Lost to Red Sox (23-23), 3-2 | Fenway Park (0-1) | 33-17 | |
| » W: Lee Smith (3-1) L: Bob Welch (6-4) | Second | 1 out |
| Tuesday, May 30 |
| » Defeated Red Sox (23-24), 4-2 | Fenway Park (1-1) | 34-17 | |
| » W: Dave Stewart (9-2) L: Mike Smithson (2-4) S: Rick Honeycutt (4) | Second | 1 out |
| Wednesday, May 31 |
| » Lost to Red Sox (24-24), 4-3 | Fenway Park (1-2) | 34-18 | |
| » W: Lee Smith (4-1) L: Eric Plunk (1-1) | Second | 1 out |
| Friday, June 2 |
| » Lost to Indians (26-26), 5-3 | Oakland-Alameda County Stadium (19-8) | 34-19 | Lost 2 |
| » W: Greg Swindell (6-1) L: Mike Moore (6-4) S: Doug Jones (12) | Second | 1 out |
| Saturday, June 3 |
| » Defeated Indians (26-27), 7-0 | Oakland-Alameda County Stadium (20-8) | 35-19 | |
| » W: Bob Welch (7-4) L: Tom Candiotti (6-3) | Second | 1 out |
| Sunday, June 4 |
| » Defeated Indians (26-28), 4-0 | Oakland-Alameda County Stadium (21-8) | 36-19 | Won 2 |
| » W: Dave Stewart (10-2) L: John Farrell (3-6) | Second | 1 out |
| Monday, June 5 |
| » Lost to Twins (26-29), 2-1 | Oakland-Alameda County Stadium (21-9) | 36-20 | |
| » W: Francisco Oliveras (3-2) L: Curt Young (2-5) S: Jeff Reardon (9) | Second | 1 out |
| Tuesday, June 6 |
| » Defeated Twins (26-30), 1-0 | Oakland-Alameda County Stadium (22-9) | 37-20 | |
| » W: Mike Moore (7-4) L: Allan Anderson (6-4) | Second | 1 out |
| Wednesday, June 7 |
| » Defeated Twins (26-31), 3-2 | Oakland-Alameda County Stadium (23-9) | 38-20 | Won 2 |
| » W: Bob Welch (8-4) L: Frank Viola (4-8) S: Todd Burns (3) | First | -- |
| Friday, June 9 |
| » Lost to Rangers (33-25), 11-8 | Arlington Stadium (0-1) | 38-21 | |
| » W: Cecilio Guante (4-3) L: Gene Nelson (1-2) S: Jeff Russell (14) | First | -- |
| Saturday, June 10 |
| » Defeated Rangers (33-26), 5-1 | Arlington Stadium (1-1) | 39-21 | |
| » W: Storm Davis (4-3) L: Bobby Witt (5-6) | First | -- |
| Sunday, June 11 |
| » Defeated Rangers (33-27), 5-1 | Arlington Stadium (2-1) | 40-21 | Won 2 |
| » W: Mike Moore (8-4) L: Kevin Brown (5-3) S: Gene Nelson (1) | First | -- |
| Monday, June 12 |
| » Lost to Royals (37-24), 2-1 | Royals Stadium (0-1) | 40-22 | |
| » W: Tom Gordon (8-2) L: Todd Burns (4-1) | First | -- |
| Tuesday, June 13 |
| » Lost to Royals (38-24), 5-3 | Royals Stadium (0-2) | 40-23 | Lost 2 |
| » W: Kevin Appier (1-1) L: Curt Young (2-6) S: Steve Farr (14) | First | -- |
| Wednesday, June 14 |
| » Defeated Royals (38-25), 2-1 | Royals Stadium (1-2) | 41-23 | |
| » W: Dave Stewart (11-2) L: Charlie Leibrandt (4-7) S: Rick Honeycutt (5) | First | -- |
| » Major-league debuts: Kevin Appier (Royals) |
| Friday, June 16 |
| » Defeated Orioles (34-28), 7-5 | Memorial Stadium (2-1) | 42-23 | Won 2 |
| » W: Storm Davis (5-3) L: Brian Holton (2-5) S: Rick Honeycutt (6) | First | -- |
| » Lost to Orioles (35-28), 5-1 | Memorial Stadium (2-2) | 42-24 | |
| » W: Jay Tibbs (3-0) L: Mike Moore (8-5) | First | -- |
| Saturday, June 17 |
| » Lost to Orioles (36-28), 4-2 | Memorial Stadium (2-3) | 42-25 | Lost 2 |
| » W: Jose Bautista (3-4) L: Matt Young (0-1) S: Gregg Olson (8) | First | -- |
| Sunday, June 18 |
| » Lost to Orioles (37-28), 4-2 | Memorial Stadium (2-4) | 42-26 | Lost 3 |
| » W: Dave Schmidt (7-5) L: Curt Young (2-7) S: Mickey Weston (1) | First | -- |
| » Major-league debuts: Mickey Weston (Orioles) |
| Monday, June 19 |
| » Lost to Tigers (26-41), 6-4 | Oakland-Alameda County Stadium (23-10) | 42-27 | Lost 4 |
| » W: Frank Tanana (7-6) L: Dave Stewart (11-3) S: Mike Henneman (1) | First | -- |
| Tuesday, June 20 |
| » Defeated Tigers (26-42), 6-4 | Oakland-Alameda County Stadium (24-10) | 43-27 | |
| » W: Gene Nelson (2-2) L: Brad Havens (0-1) S: Todd Burns (4) | First | -- |
| Wednesday, June 21 |
| » Defeated Tigers (26-43), 6-3 | Oakland-Alameda County Stadium (25-10) | 44-27 | Won 2 |
| » W: Mike Moore (9-5) L: Mike Schwabe (1-3) S: Rick Honeycutt (7) | First | -- |
| Thursday, June 22 |
| » Lost to Blue Jays (35-36), 4-2 | Oakland-Alameda County Stadium (25-11) | 44-28 | |
| » W: Xavier Hernandez (1-0) L: Jim Corsi (0-1) S: David Wells (2) | First | -- |
| Friday, June 23 |
| » Lost to Blue Jays (36-36), 10-8 | Oakland-Alameda County Stadium (25-12) | 44-29 | Lost 2 |
| » W: De Wayne Buice (1-0) L: Curt Young (2-8) S: Tom Henke (3) | First | -- |
| Saturday, June 24 |
| » Defeated Blue Jays (36-37), 7-1 | Oakland-Alameda County Stadium (26-12) | 45-29 | |
| » W: Dave Stewart (12-3) L: Dave Stieb (7-4) | First | -- |
| » Major-league debuts: Steve Cummings (Blue Jays) |
| Sunday, June 25 |
| » Defeated Blue Jays (36-38), 6-3 | Oakland-Alameda County Stadium (27-12) | 46-29 | Won 2 |
| » W: Storm Davis (6-3) L: Jimmy Key (7-7) S: Rick Honeycutt (8) | First | -- |
| Monday, June 26 |
| » Lost to Twins (38-37), 4-3 | Hubert H. Humphrey Metrodome (0-1) | 46-30 | |
| » W: Jeff Reardon (2-2) L: Todd Burns (4-2) | First | -- |
| Tuesday, June 27 |
| » Lost to Twins (39-37), 11-5 | Hubert H. Humphrey Metrodome (0-2) | 46-31 | Lost 2 |
| » W: Gary Wayne (3-0) L: Gene Nelson (2-3) S: Juan Berenguer (2) | First | -- |
| » Major-league debuts: Greg Olson (Twins) |
| Wednesday, June 28 |
| » Lost to Twins (40-37), 2-0 | Hubert H. Humphrey Metrodome (0-3) | 46-32 | Lost 3 |
| » W: Frank Viola (6-8) L: Dave Stewart (12-4) | First | -- |
| Friday, June 30 |
| » Defeated Indians (36-41), 5-0 | Cleveland Stadium (1-0) | 47-32 | |
| » W: Bob Welch (9-4) L: Greg Swindell (10-2) S: Rick Honeycutt (9) | First | -- |
| Saturday, July 1 |
| » Defeated Indians (36-42), 6-4 | Cleveland Stadium (2-0) | 48-32 | Won 2 |
| » W: Mike Moore (10-5) L: Rich Yett (4-6) S: Todd Burns (5) | First | -- |
| Sunday, July 2 |
| » Defeated Indians (36-43), 11-3 | Cleveland Stadium (3-0) | 49-32 | Won 3 |
| » W: Storm Davis (7-3) L: John Farrell (4-9) | First | -- |
| Monday, July 3 |
| » Defeated Royals (44-36), 1-0 | Oakland-Alameda County Stadium (28-12) | 50-32 | Won 4 |
| » W: Dave Stewart (13-4) L: Mark Gubicza (8-6) S: Rick Honeycutt (10) | First | -- |
| Tuesday, July 4 |
| » Lost to Royals (45-36), 10-1 | Oakland-Alameda County Stadium (28-13) | 50-33 | |
| » W: Bret Saberhagen (8-4) L: Matt Young (0-2) | First | -- |
| Wednesday, July 5 |
| » Lost to Royals (46-36), 12-9 | Oakland-Alameda County Stadium (28-14) | 50-34 | Lost 2 |
| » W: Steve Crawford (1-0) L: Rick Honeycutt (1-1) | Second | 1½ out |
| Thursday, July 6 |
| » Defeated Royals (46-37), 3-1 | Oakland-Alameda County Stadium (29-14) | 51-34 | |
| » W: Mike Moore (11-5) L: Luis Aquino (3-4) S: Todd Burns (6) | First | -- |
| Friday, July 7 |
| » Lost to Rangers (46-38), 6-3 | Oakland-Alameda County Stadium (29-15) | 51-35 | |
| » W: Bobby Witt (7-8) L: Storm Davis (7-4) S: Jeff Russell (20) | Second | 1½ out |
| Saturday, July 8 |
| » Lost to Rangers (47-38), 5-4 | Oakland-Alameda County Stadium (29-16) | 51-36 | Lost 2 |
| » W: Jeff Russell (4-2) L: Matt Young (0-3) | Second | 1½ out |
| Sunday, July 9 |
| » Defeated Rangers (47-39), 7-1 | Oakland-Alameda County Stadium (30-16) | 52-36 | |
| » W: Bob Welch (10-4) L: Charlie Hough (5-10) S: Rick Honeycutt (11) | Second | 1½ out |
| Thursday, July 13 |
| » Defeated Blue Jays (42-46), 11-7 | Skydome (1-0) | 53-36 | Won 2 |
| » W: Todd Burns (5-2) L: Jimmy Key (7-9) | Second | 1½ out |
| Friday, July 14 |
| » Lost to Blue Jays (43-46), 4-1 | Skydome (1-1) | 53-37 | |
| » W: Dave Stieb (9-5) L: Bob Welch (10-5) S: Duane Ward (9) | Second | 1½ out |
| Saturday, July 15 |
| » Lost to Blue Jays (44-46), 6-1 | Skydome (1-2) | 53-38 | Lost 2 |
| » W: Mike Flanagan (5-6) L: Dave Stewart (13-5) | Second | 1½ out |
| Sunday, July 16 |
| » Defeated Blue Jays (44-47), 6-2 | Skydome (2-2) | 54-38 | |
| » W: Mike Moore (12-5) L: John Cerutti (5-5) S: Todd Burns (7) | Second | 1½ out |
| Monday, July 17 |
| » Lost to Tigers (33-57), 2-1 | Tiger Stadium (2-2) | 54-39 | |
| » W: Mike Henneman (6-2) L: Gene Nelson (2-4) | Second | 1 out |
| Tuesday, July 18 |
| » Defeated Tigers (33-58), 7-2 | Tiger Stadium (3-2) | 55-39 | |
| » W: Storm Davis (8-4) L: Dave Beard (0-1) | Second | 1 out |
| Thursday, July 20 |
| » Defeated Orioles (53-40), 5-2 | Oakland-Alameda County Stadium (31-16) | 56-39 | Won 2 |
| » W: Dave Stewart (14-5) L: Dave Schmidt (8-9) S: Dennis Eckersley (15) | Second | 1 out |
| Friday, July 21 |
| » Defeated Orioles (53-41), 3-2 | Oakland-Alameda County Stadium (32-16) | 57-39 | Won 3 |
| » W: Mike Moore (13-5) L: Gregg Olson (3-1) | Second | 1 out |
| Saturday, July 22 |
| » Defeated Orioles (53-42), 3-1 | Oakland-Alameda County Stadium (33-16) | 58-39 | Won 4 |
| » W: Bob Welch (11-5) L: Pete Harnisch (1-3) S: Dennis Eckersley (16) | Second | 1 out |
| Sunday, July 23 |
| » Defeated Orioles (53-43), 3-2 | Oakland-Alameda County Stadium (34-16) | 59-39 | Won 5 |
| » W: Storm Davis (9-4) L: Jeff Ballard (11-5) S: Dennis Eckersley (17) | Second | 1 out |
| Monday, July 24 |
| » Lost to Angels (59-38), 5-4 | Oakland-Alameda County Stadium (34-17) | 59-40 | |
| » W: Willie Fraser (3-5) L: Gene Nelson (2-5) S: Bryan Harvey (13) | Second | 1 out |
| Tuesday, July 25 |
| » Lost to Angels (60-38), 4-0 | Oakland-Alameda County Stadium (34-18) | 59-41 | Lost 2 |
| » W: Chuck Finley (12-6) L: Dave Stewart (14-6) S: Greg Minton (6) | Second | 2 out |
| Wednesday, July 26 |
| » Defeated Angels (60-39), 9-5 | Oakland-Alameda County Stadium (35-18) | 60-41 | |
| » W: Matt Young (1-3) L: Mike Witt (7-8) | Second | 1 out |
| Friday, July 28 |
| » Defeated Mariners (48-53), 8-7 | Oakland-Alameda County Stadium (36-18) | 61-41 | Won 2 |
| » W: Todd Burns (6-2) L: Gene Harris (2-5) | Second | 1½ out |
| Saturday, July 29 |
| » Lost to Mariners (49-53), 14-6 | Oakland-Alameda County Stadium (36-19) | 61-42 | |
| » W: Randy Johnson (5-6) L: Storm Davis (9-5) S: Bill Swift (1) | Second | 2½ out |
| Sunday, July 30 |
| » Defeated Mariners (49-54), 5-3 | Oakland-Alameda County Stadium (37-19) | 62-42 | |
| » W: Dave Stewart (15-6) L: Brian Holman (5-5) S: Dennis Eckersley (18) | Second | 1½ out |
| Monday, July 31 |
| » Defeated White Sox (44-61), 3-2 | Oakland-Alameda County Stadium (38-19) | 63-42 | Won 2 |
| » W: Mike Moore (14-5) L: Bobby Thigpen (1-4) | Second | ½ out |
| Tuesday, August 1 |
| » Defeated White Sox (44-62), 2-0 | Oakland-Alameda County Stadium (39-19) | 64-42 | Won 3 |
| » W: Curt Young (3-8) L: Greg Hibbard (2-3) S: Dennis Eckersley (19) | First | -- |
| Wednesday, August 2 |
| » Defeated White Sox (44-63), 2-0 | Oakland-Alameda County Stadium (40-19) | 65-42 | Won 4 |
| » W: Storm Davis (10-5) L: Melido Perez (7-12) S: Rick Honeycutt (12) | First | -- |
| Thursday, August 3 |
| » Lost to White Sox (45-63), 6-4 | Oakland-Alameda County Stadium (40-20) | 65-43 | |
| » W: Donn Pall (4-2) L: Bob Welch (11-6) S: Bobby Thigpen (23) | Second | ½ out |
| Friday, August 4 |
| » Defeated Mariners (51-57), 5-3 | Kingdome (3-1) | 66-43 | |
| » W: Dave Stewart (16-6) L: Brian Holman (5-6) S: Dennis Eckersley (20) | Second | ½ out |
| Saturday, August 5 |
| » Lost to Mariners (52-57), 11-5 | Kingdome (3-2) | 66-44 | |
| » W: Scott Bankhead (11-4) L: Mike Moore (14-6) S: Mike Jackson (5) | Second | ½ out |
| Sunday, August 6 |
| » Defeated Mariners (52-58), 2-1 | Kingdome (4-2) | 67-44 | |
| » W: Storm Davis (11-5) L: Mike Dunne (3-7) S: Dennis Eckersley (21) | Second | ½ out |
| Monday, August 7 |
| » Lost to Mariners (53-58), 5-1 | Kingdome (4-3) | 67-45 | |
| » W: Clint Zavaras (1-2) L: Bob Welch (11-7) | Second | 1 out |
| Tuesday, August 8 |
| » Defeated White Sox (47-65), 3-2 | Comiskey Park I (3-1) | 68-45 | |
| » W: Rick Honeycutt (2-1) L: Donn Pall (4-3) S: Dennis Eckersley (22) | Second | 1 out |
| Wednesday, August 9 |
| » Lost to White Sox (48-65), 3-2 | Comiskey Park I (3-2) | 68-46 | |
| » W: Tom McCarthy (1-1) L: Jim Corsi (0-2) | Second | 1 out |
| Thursday, August 10 |
| » Defeated White Sox (48-66), 4-1 | Comiskey Park I (4-2) | 69-46 | |
| » W: Storm Davis (12-5) L: Steve Rosenberg (3-8) S: Dennis Eckersley (23) | Second | 1 out |
| Friday, August 11 |
| » Defeated Angels (68-46), 5-0 | Anaheim Stadium (3-2) | 70-46 | Won 2 |
| » W: Mike Moore (15-6) L: Mike Witt (7-10) | First | -- |
| Saturday, August 12 |
| » Defeated Angels (68-47), 8-3 | Anaheim Stadium (4-2) | 71-46 | Won 3 |
| » W: Bob Welch (12-7) L: Jim Abbott (10-8) S: Todd Burns (8) | First | -- |
| » Major-league debuts: Bobby Rose (Angels) |
| Sunday, August 13 |
| » Lost to Angels (69-47), 4-3 | Anaheim Stadium (4-3) | 71-47 | |
| » W: Bert Blyleven (12-2) L: Dave Stewart (16-7) S: Bryan Harvey (17) | First | -- |
| Tuesday, August 15 |
| » Defeated Indians (57-62), 5-2 | Oakland-Alameda County Stadium (41-20) | 72-47 | |
| » W: Storm Davis (13-5) L: Rod Nichols (3-2) S: Dennis Eckersley (24) | First | -- |
| Wednesday, August 16 |
| » Lost to Indians (58-62), 6-3 | Oakland-Alameda County Stadium (41-21) | 72-48 | |
| » W: Steve Olin (1-0) L: Rick Honeycutt (2-2) S: Doug Jones (28) | First | -- |
| Thursday, August 17 |
| » Defeated Indians (58-63), 1-0 | Oakland-Alameda County Stadium (42-21) | 73-48 | |
| » W: Bob Welch (13-7) L: John Farrell (7-12) S: Dennis Eckersley (25) | First | -- |
| Friday, August 18 |
| » Lost to Twins (60-61), 4-3 | Oakland-Alameda County Stadium (42-22) | 73-49 | |
| » W: Roy Smith (9-4) L: Dave Stewart (16-8) S: Jeff Reardon (23) | Second | 1 out |
| Saturday, August 19 |
| » Defeated Twins (60-62), 5-4 | Oakland-Alameda County Stadium (43-22) | 74-49 | |
| » W: Storm Davis (14-5) L: Gary Wayne (3-4) | Second | 1 out |
| Sunday, August 20 |
| » Defeated Twins (60-63), 5-0 | Oakland-Alameda County Stadium (44-22) | 75-49 | Won 2 |
| » W: Mike Moore (16-6) L: Allan Anderson (14-10) | Second | 1 out |
| Monday, August 21 |
| » Defeated Tigers (47-78), 6-1 | Tiger Stadium (4-2) | 76-49 | Won 3 |
| » W: Curt Young (4-8) L: Frank Tanana (9-11) | First | -- |
| Tuesday, August 22 |
| » Defeated Rangers (65-58), 2-0 | Arlington Stadium (3-1) | 77-49 | Won 4 |
| » W: Bob Welch (14-7) L: Nolan Ryan (14-8) S: Dennis Eckersley (26) | First | -- |
| Wednesday, August 23 |
| » Defeated Rangers (65-59), 5-4 | Arlington Stadium (4-1) | 78-49 | Won 5 |
| » W: Dave Stewart (17-8) L: Kevin Brown (11-8) S: Dennis Eckersley (27) | First | -- |
| Thursday, August 24 |
| » Lost to Rangers (66-59), 6-2 | Arlington Stadium (4-2) | 78-50 | |
| » W: Mike Jeffcoat (7-5) L: Storm Davis (14-6) S: Gary Mielke (1) | First | -- |
| Friday, August 25 |
| » Lost to Royals (74-54), 3-1 | Royals Stadium (1-3) | 78-51 | Lost 2 |
| » W: Mark Gubicza (12-10) L: Mike Moore (16-7) S: Jeff Montgomery (14) | First | -- |
| Saturday, August 26 |
| » Lost to Royals (75-54), 2-0 | Royals Stadium (1-4) | 78-52 | Lost 3 |
| » W: Bret Saberhagen (16-5) L: Curt Young (4-9) | First | -- |
| Sunday, August 27 |
| » Defeated Royals (75-55), 6-0 | Royals Stadium (2-4) | 79-52 | |
| » W: Bob Welch (15-7) L: Tom Gordon (16-5) | First | -- |
| Monday, August 28 |
| » Defeated Yankees (58-75), 7-3 | Yankee Stadium (4-0) | 80-52 | Won 2 |
| » W: Dave Stewart (18-8) L: Andy Hawkins (13-13) S: Dennis Eckersley (28) | First | -- |
| Tuesday, August 29 |
| » Defeated Yankees (58-76), 19-5 | Yankee Stadium (5-0) | 81-52 | Won 3 |
| » W: Storm Davis (15-6) L: Chuck Cary (3-3) | First | -- |
| Wednesday, August 30 |
| » Lost to Yankees (59-76), 8-5 | Yankee Stadium (5-1) | 81-53 | |
| » W: Eric Plunk (5-4) L: Mike Moore (16-8) S: Lance McCullers (2) | First | -- |
| Friday, September 1 |
| » Lost to Brewers (68-69), 6-5 | County Stadium (1-3) | 81-54 | Lost 2 |
| » W: Chuck Crim (9-5) L: Todd Burns (6-3) | First | -- |
| Saturday, September 2 |
| » Defeated Brewers (68-70), 7-2 | County Stadium (2-3) | 82-54 | |
| » W: Dave Stewart (19-8) L: Tom Filer (5-3) | First | -- |
| Sunday, September 3 |
| » Defeated Brewers (68-71), 5-0 | County Stadium (3-3) | 83-54 | Won 2 |
| » W: Storm Davis (16-6) L: Jaime Navarro (4-7) S: Gene Nelson (2) | First | -- |
| Monday, September 4 |
| » Lost to Red Sox (70-68), 8-5 | Oakland-Alameda County Stadium (44-23) | 83-55 | |
| » W: John Dopson (10-6) L: Mike Moore (16-9) S: Lee Smith (21) | First | -- |
| Tuesday, September 5 |
| » Defeated Red Sox (70-69), 13-1 | Oakland-Alameda County Stadium (45-23) | 84-55 | |
| » W: Curt Young (5-9) L: Roger Clemens (14-10) | First | -- |
| Wednesday, September 6 |
| » Defeated Red Sox (70-70), 7-5 | Oakland-Alameda County Stadium (46-23) | 85-55 | Won 2 |
| » W: Bob Welch (16-7) L: Mike Smithson (7-14) S: Dennis Eckersley (29) | First | -- |
| Friday, September 8 |
| » Lost to Yankees (67-76), 5-1 | Oakland-Alameda County Stadium (46-24) | 85-56 | |
| » W: Dale Mohorcic (2-1) L: Dave Stewart (19-9) | First | -- |
| Saturday, September 9 |
| » Defeated Yankees (67-77), 7-0 | Oakland-Alameda County Stadium (47-24) | 86-56 | |
| » W: Mike Moore (17-9) L: Clay Parker (4-5) | First | -- |
| » Major-league debuts: Scott Hemond (Athletics) |
| Sunday, September 10 |
| » Defeated Yankees (67-78), 6-2 | Oakland-Alameda County Stadium (48-24) | 87-56 | Won 2 |
| » W: Storm Davis (17-6) L: Eric Plunk (6-5) | First | -- |
| Tuesday, September 12 |
| » Lost to Brewers (74-72), 7-6 | Oakland-Alameda County Stadium (48-25) | 87-57 | |
| » W: Don August (10-11) L: Matt Young (1-4) S: Dan Plesac (30) | First | -- |
| Wednesday, September 13 |
| » Defeated Brewers (74-73), 7-6 | Oakland-Alameda County Stadium (49-25) | 88-57 | |
| » W: Dennis Eckersley (2-0) L: Chuck Crim (9-6) | First | -- |
| Friday, September 15 |
| » Lost to Red Sox (71-76), 7-2 | Fenway Park (1-3) | 88-58 | |
| » W: Roger Clemens (15-10) L: Mike Moore (17-10) | First | -- |
| » Major-league debuts: Dann Howitt (Athletics) |
| Saturday, September 16 |
| » Lost to Red Sox (72-76), 5-2 | Fenway Park (1-4) | 88-59 | Lost 2 |
| » W: John Dopson (11-7) L: Storm Davis (17-7) S: Dennis Lamp (1) | First | -- |
| Sunday, September 17 |
| » Lost to Red Sox (73-76), 7-6 | Fenway Park (1-5) | 88-60 | Lost 3 |
| » W: Greg Harris (4-3) L: Bob Welch (16-8) S: Lee Smith (22) | First | -- |
| Monday, September 18 |
| » Defeated Indians (67-83), 4-2 | Cleveland Stadium (4-0) | 89-60 | |
| » W: Dennis Eckersley (3-0) L: Steve Olin (1-3) | First | -- |
| Tuesday, September 19 |
| » Defeated Indians (67-84), 5-1 | Cleveland Stadium (5-0) | 90-60 | Won 2 |
| » W: Mike Moore (18-10) L: Rod Nichols (4-5) | First | -- |
| Wednesday, September 20 |
| » Defeated Indians (67-85), 8-6 | Cleveland Stadium (6-0) | 91-60 | Won 3 |
| » W: Storm Davis (18-7) L: Greg Swindell (13-6) S: Dennis Eckersley (30) | First | -- |
| Thursday, September 21 |
| » Defeated Twins (76-77), 2-1 | Hubert H. Humphrey Metrodome (1-3) | 92-60 | Won 4 |
| » W: Bob Welch (17-8) L: Rick Aguilera (8-11) S: Dennis Eckersley (31) | First | -- |
| Friday, September 22 |
| » Defeated Twins (76-78), 5-2 | Hubert H. Humphrey Metrodome (2-3) | 93-60 | Won 5 |
| » W: Dave Stewart (20-9) L: Mike Dyer (3-7) S: Gene Nelson (3) | First | -- |
| Saturday, September 23 |
| » Lost to Twins (77-78), 5-3 | Hubert H. Humphrey Metrodome (2-4) | 93-61 | |
| » W: Allan Anderson (17-10) L: Mike Moore (18-11) S: Roy Smith (1) | First | -- |
| Sunday, September 24 |
| » Defeated Twins (77-79), 9-3 | Hubert H. Humphrey Metrodome (3-4) | 94-61 | |
| » W: Storm Davis (19-7) L: Kevin Tapani (2-2) S: Dennis Eckersley (32) | First | -- |
| Monday, September 25 |
| » Lost to Rangers (81-75), 3-2 | Oakland-Alameda County Stadium (49-26) | 94-62 | |
| » W: Drew Hall (2-1) L: Todd Burns (6-4) S: Jeff Russell (38) | First | -- |
| Tuesday, September 26 |
| » Defeated Rangers (81-76), 4-3 | Oakland-Alameda County Stadium (50-26) | 95-62 | |
| » W: Dennis Eckersley (4-0) L: Mike Jeffcoat (9-6) | First | -- |
| Wednesday, September 27 |
| » Defeated Rangers (81-77), 5-0 | Oakland-Alameda County Stadium (51-26) | 96-62 | Won 2 |
| » W: Mike Moore (19-11) L: Jamie Moyer (4-9) | First | -- |
| Thursday, September 28 |
| » Defeated Rangers (81-78), 5-3 | Oakland-Alameda County Stadium (52-26) | 97-62 | Won 3 |
| » W: Dave Stewart (21-9) L: Brad Arnsberg (2-1) S: Dennis Eckersley (33) | First | -- |
| Friday, September 29 |
| » Defeated Royals (91-69), 4-3 | Oakland-Alameda County Stadium (53-26) | 98-62 | Won 4 |
| » W: Gene Nelson (3-5) L: Rick Luecken (2-1) | First | -- |
| Saturday, September 30 |
| » Lost to Royals (92-69), 6-1 | Oakland-Alameda County Stadium (53-27) | 98-63 | |
| » W: Bret Saberhagen (23-6) L: Todd Burns (6-5) | First | -- |
| Sunday, October 1 |
| » Defeated Royals (92-70), 4-3 | Oakland-Alameda County Stadium (54-27) | 99-63 | |
| » W: Jim Corsi (1-2) L: Terry Leach (5-6) | First | -- |
| Monday, December 25 |
| Former Athletic Billy Martin dies in Johnson City, NY at the age of 62. |
Game information provided by Retrosheet (www.retrosheet.org) |