| Friday, January 2 |
| Former Athletic Bill Upton dies in San Diego, CA at the age of 58. |
| Saturday, January 17 |
| Former Athletic Ed Busch dies in St.Clair Co., IL at the age of 70. |
| Monday, April 6 |
| » Major-league debuts: Mike Sharperson (Blue Jays) |
| Tuesday, April 7 |
| » Lost to Twins (1-0), 5-4 | Hubert H. Humphrey Metrodome (0-1) | 0-1 | |
| » W: George Frazier (1-0) L: Bill Krueger (0-1) | Second | 1 out |
| Wednesday, April 8 |
| » Lost to Twins (2-0), 4-1 | Hubert H. Humphrey Metrodome (0-2) | 0-2 | Lost 2 |
| » W: Frank Viola (1-0) L: Eric Plunk (0-1) S: Jeff Reardon (1) | Third | 2 out |
| Thursday, April 9 |
| » Lost to Twins (3-0), 5-4 | Hubert H. Humphrey Metrodome (0-3) | 0-3 | Lost 3 |
| » W: Juan Berenguer (1-0) L: Jay Howell (0-1) | Fourth | 3 out |
| » Major-league debuts: Joe Klink (Twins) |
| Friday, April 10 |
| » Lost to Angels (3-1), 6-4 | Oakland-Alameda County Stadium (0-1) | 0-4 | Lost 4 |
| » W: Kirk McCaskill (1-0) L: Dave Stewart (0-1) S: Donnie Moore (1) | Fifth | 4 out |
| Saturday, April 11 |
| » Lost to Angels (4-1), 6-3 | Oakland-Alameda County Stadium (0-2) | 0-5 | Lost 5 |
| » W: Willie Fraser (1-0) L: Bill Krueger (0-2) S: Gary Lucas (1) | Fourth | 4 out |
| Sunday, April 12 |
| » Defeated Angels (4-2), 7-1 | Oakland-Alameda County Stadium (1-2) | 1-5 | |
| » W: Curt Young (1-0) L: Mike Witt (1-1) | Fifth | 4 out |
| Monday, April 13 |
| » Defeated Twins (5-2), 6-3 | Oakland-Alameda County Stadium (2-2) | 2-5 | Won 2 |
| » W: Jay Howell (1-1) L: George Frazier (1-1) | Fourth | 3 out |
| Tuesday, April 14 |
| » Lost to Twins (6-2), 9-8 | Oakland-Alameda County Stadium (2-3) | 2-6 | |
| » W: Keith Atherton (1-0) L: Chris Codiroli (0-1) S: Jeff Reardon (2) | Sixth | 4 out |
| Wednesday, April 15 |
| » Lost to Twins (7-2), 5-2 | Oakland-Alameda County Stadium (2-4) | 2-7 | Lost 2 |
| » W: Mike Smithson (2-0) L: Dave Stewart (0-2) S: Jeff Reardon (3) | Sixth | 5 out |
| Thursday, April 16 |
| » Lost to Mariners (4-6), 6-5 | Kingdome (0-1) | 2-8 | Lost 3 |
| » W: Mike Trujillo (1-0) L: Jose Rijo (0-1) S: Ed Nunez (2) | Sixth | 5½ out |
| Friday, April 17 |
| » Lost to Mariners (5-6), 4-2 | Kingdome (0-2) | 2-9 | Lost 4 |
| » W: Mark Langston (1-2) L: Curt Young (1-1) | Fifth | 5½ out |
| Saturday, April 18 |
| » Defeated Mariners (5-7), 7-5 | Kingdome (1-2) | 3-9 | |
| » W: Jay Howell (2-1) L: Mike Moore (0-2) | Sixth | 5½ out |
| Sunday, April 19 |
| » Lost to Mariners (6-7), 8-1 | Kingdome (1-3) | 3-10 | |
| » W: Scott Bankhead (3-0) L: Chris Codiroli (0-2) | Fifth | 5½ out |
| Monday, April 20 |
| » Defeated Angels (8-5), 10-5 | Anaheim Stadium (1-0) | 4-10 | |
| » W: Dave Stewart (1-2) L: Gary Lucas (0-1) S: Jay Howell (1) | Sixth | 5½ out |
| Tuesday, April 21 |
| » Lost to Angels (9-5), 8-5 | Anaheim Stadium (1-1) | 4-11 | |
| » W: Mike Cook (1-0) L: Dennis Eckersley (0-1) S: Willie Fraser (1) | Sixth | 6½ out |
| Wednesday, April 22 |
| » Defeated Angels (9-6), 7-6 | Anaheim Stadium (2-1) | 5-11 | |
| » W: Curt Young (2-1) L: Mike Witt (2-2) S: Jay Howell (2) | Sixth | 5½ out |
| Friday, April 24 |
| » Lost to Mariners (8-9), 6-3 | Oakland-Alameda County Stadium (2-5) | 5-12 | |
| » W: Mike Moore (1-2) L: Bill Krueger (0-3) | Sixth | 6 out |
| Saturday, April 25 |
| » Defeated Mariners (8-10), 7-3 | Oakland-Alameda County Stadium (3-5) | 6-12 | |
| » W: Dave Stewart (2-2) L: Scott Bankhead (3-1) S: Dennis Eckersley (1) | Fifth | 5 out |
| Sunday, April 26 |
| » Lost to Mariners (9-10), 8-5 | Oakland-Alameda County Stadium (3-6) | 6-13 | |
| » W: Mike Trujillo (2-1) L: Jose Rijo (0-2) S: Ed Nunez (3) | Seventh | 6 out |
| Monday, April 27 |
| » Defeated Red Sox (8-11), 5-2 | Oakland-Alameda County Stadium (4-6) | 7-13 | |
| » W: Curt Young (3-1) L: Bob Stanley (2-3) | Seventh | 5½ out |
| Tuesday, April 28 |
| » Defeated Red Sox (8-12), 7-1 | Oakland-Alameda County Stadium (5-6) | 8-13 | Won 2 |
| » W: Dennis Eckersley (1-1) L: Jeff Sellers (1-1) | Sixth | 4½ out |
| Wednesday, April 29 |
| » Lost to Brewers (18-2), 8-7 | Oakland-Alameda County Stadium (5-7) | 8-14 | |
| » W: Chris Bosio (3-0) L: Gene Nelson (0-1) S: Dan Plesac (7) | Sixth | 4½ out |
| Thursday, April 30 |
| » Defeated Brewers (18-3), 4-1 | Oakland-Alameda County Stadium (6-7) | 9-14 | |
| » W: Dave Stewart (3-2) L: Bill Wegman (2-1) S: Jay Howell (3) | Fifth | 4 out |
| Friday, May 1 |
| » Defeated Tigers (9-13), 2-1 | Oakland-Alameda County Stadium (7-7) | 10-14 | Won 2 |
| » W: Dennis Eckersley (2-1) L: Bryan Kelly (0-1) | Fourth | 4 out |
| Saturday, May 2 |
| » Defeated Tigers (9-14), 3-2 | Oakland-Alameda County Stadium (8-7) | 11-14 | Won 3 |
| » W: Dave Leiper (1-0) L: Nate Snell (0-1) | Fifth | 3 out |
| Sunday, May 3 |
| » Defeated Tigers (9-15), 2-0 | Oakland-Alameda County Stadium (9-7) | 12-14 | Won 4 |
| » W: Eric Plunk (1-1) L: Eric King (2-2) S: Jay Howell (4) | Fifth | 3 out |
| Tuesday, May 5 |
| » Lost to Red Sox (11-15), 6-0 | Fenway Park (0-1) | 12-15 | |
| » W: Bruce Hurst (3-3) L: Dave Stewart (3-3) | Fifth | 3 out |
| Wednesday, May 6 |
| » Lost to Red Sox (12-15), 6-2 | Fenway Park (0-2) | 12-16 | Lost 2 |
| » W: Calvin Schiraldi (1-2) L: Dennis Eckersley (2-2) | Fifth | 4 out |
| Friday, May 8 |
| » Defeated Tigers (10-17), 7-2 | Tiger Stadium (1-0) | 13-16 | |
| » W: Curt Young (4-1) L: Frank Tanana (2-2) | Fifth | 3 out |
| Saturday, May 9 |
| » Defeated Tigers (10-18), 8-7 | Tiger Stadium (2-0) | 14-16 | Won 2 |
| » W: Gene Nelson (1-1) L: Mark Thurmond (0-1) S: Jay Howell (5) | Fifth | 3 out |
| Sunday, May 10 |
| » Lost to Tigers (11-18), 7-6 | Tiger Stadium (2-1) | 14-17 | |
| » W: Nate Snell (1-1) L: Steve Ontiveros (0-1) | Fourth | 3 out |
| Tuesday, May 12 |
| » Defeated Brewers (20-10), 10-8 | County Stadium (1-0) | 15-17 | |
| » W: Dave Stewart (4-3) L: Paul Mirabella (2-1) S: Jay Howell (6) | Fourth | 2½ out |
| Wednesday, May 13 |
| » Defeated Brewers (20-11), 8-2 | County Stadium (2-0) | 16-17 | Won 2 |
| » W: Curt Young (5-1) L: Teddy Higuera (4-2) | Fifth | 2½ out |
| Friday, May 15 |
| » Lost to Blue Jays (21-12), 3-2 | Oakland-Alameda County Stadium (9-8) | 16-18 | |
| » W: Joe Johnson (2-3) L: Eric Plunk (1-2) S: Tom Henke (6) | Fourth | 3 out |
| Saturday, May 16 |
| » Defeated Blue Jays (21-13), 10-3 | Oakland-Alameda County Stadium (10-8) | 17-18 | |
| » W: Moose Haas (1-0) L: Jimmy Key (5-3) | Fifth | 3 out |
| Sunday, May 17 |
| » Defeated Blue Jays (21-14), 3-0 | Oakland-Alameda County Stadium (11-8) | 18-18 | Won 2 |
| » W: Dave Stewart (5-3) L: John Cerutti (1-2) | Fourth | 3 out |
| Monday, May 18 |
| » Lost to Yankees (25-13), 2-1 | Oakland-Alameda County Stadium (11-9) | 18-19 | |
| » W: Tommy John (3-1) L: Curt Young (5-2) S: Tim Stoddard (1) | Fifth | 4 out |
| Tuesday, May 19 |
| » Defeated Yankees (25-14), 4-2 | Oakland-Alameda County Stadium (12-9) | 19-19 | |
| » W: Dennis Eckersley (3-2) L: Dennis Rasmussen (3-3) S: Jay Howell (7) | Third | 4 out |
| » Major-league debuts: Keith Hughes (Yankees) |
| Wednesday, May 20 |
| » Defeated Yankees (25-15), 7-5 | Oakland-Alameda County Stadium (13-9) | 20-19 | Won 2 |
| » W: Gene Nelson (2-1) L: Charles Hudson (6-1) | Third | 3 out |
| Thursday, May 21 |
| » Major-league debuts: Gene Larkin (Twins) |
| Friday, May 22 |
| » Lost to Orioles (21-20), 10-6 | Oakland-Alameda County Stadium (13-10) | 20-20 | |
| » W: Dave J. Schmidt (6-1) L: Moose Haas (1-1) S: Ken Dixon (3) | Third | 4 out |
| Saturday, May 23 |
| » Lost to Orioles (22-20), 5-4 | Oakland-Alameda County Stadium (13-11) | 20-21 | Lost 2 |
| » W: Mike Boddicker (4-1) L: Dave Stewart (5-4) S: Don Aase (2) | Third | 4 out |
| Sunday, May 24 |
| » Lost to Orioles (23-20), 4-3 | Oakland-Alameda County Stadium (13-12) | 20-22 | Lost 3 |
| » W: Jeff Ballard (2-0) L: Curt Young (5-3) S: Ken Dixon (4) | Fourth | 5 out |
| Monday, May 25 |
| » Lost to Orioles (24-20), 4-3 | Oakland-Alameda County Stadium (13-13) | 20-23 | Lost 4 |
| » W: Eric Bell (5-1) L: Dennis Eckersley (3-3) S: Ken Dixon (5) | Fifth | 6 out |
| Wednesday, May 27 |
| » Defeated Blue Jays (25-18), 4-1 | Exhibition Stadium (1-0) | 21-23 | |
| » W: Moose Haas (2-1) L: Joe Johnson (2-4) S: Steve Ontiveros (1) | Third | 5½ out |
| Thursday, May 28 |
| » Defeated Blue Jays (25-19), 4-3 | Exhibition Stadium (2-0) | 22-23 | Won 2 |
| » W: Dave Stewart (6-4) L: Jim Clancy (7-3) S: Dave Leiper (1) | Fourth | 5 out |
| Friday, May 29 |
| » Defeated Yankees (30-17), 13-5 | Yankee Stadium (1-0) | 23-23 | Won 3 |
| » W: Curt Young (6-3) L: Dennis Rasmussen (3-4) | Third | 4 out |
| Saturday, May 30 |
| » Defeated Yankees (30-18), 4-3 | Yankee Stadium (2-0) | 24-23 | Won 4 |
| » W: Joaquin Andujar (1-0) L: Joe Niekro (3-3) S: Jay Howell (8) | Third | 4 out |
| Sunday, May 31 |
| » Lost to Yankees (31-18), 9-5 | Yankee Stadium (2-1) | 24-24 | |
| » W: Tommy John (5-1) L: Dennis Eckersley (3-4) | Third | 4 out |
| Monday, June 1 |
| » Defeated Orioles (26-24), 9-6 | Memorial Stadium (1-0) | 25-24 | |
| » W: Gene Nelson (3-1) L: Ken Dixon (3-4) S: Jay Howell (9) | Third | 3 out |
| Tuesday, June 2 |
| » Lost to Orioles (27-24), 9-2 | Memorial Stadium (1-1) | 25-25 | |
| » W: Mike Boddicker (5-1) L: Dave Stewart (6-5) | Third | 3 out |
| Wednesday, June 3 |
| » Defeated Orioles (27-25), 7-3 | Memorial Stadium (2-1) | 26-25 | |
| » W: Curt Young (7-3) L: Jeff Ballard (2-2) | Third | 2 out |
| Friday, June 5 |
| » Lost to Indians (18-35), 4-3 | Oakland-Alameda County Stadium (13-14) | 26-26 | |
| » W: Tom Candiotti (2-6) L: Joaquin Andujar (1-1) S: Scott Bailes (4) | Fourth | 2½ out |
| Saturday, June 6 |
| » Defeated Indians (18-36), 6-4 | Oakland-Alameda County Stadium (14-14) | 27-26 | |
| » W: Dennis Eckersley (4-4) L: Greg Swindell (3-6) | Fourth | 2½ out |
| Sunday, June 7 |
| » Lost to Indians (19-36), 12-2 | Oakland-Alameda County Stadium (14-15) | 27-27 | |
| » W: Steve Carlton (4-4) L: Dave Stewart (6-6) | Third | 3½ out |
| Monday, June 8 |
| » Defeated White Sox (22-31), 9-3 | Oakland-Alameda County Stadium (15-15) | 28-27 | |
| » W: Steve Ontiveros (1-1) L: Floyd Bannister (3-5) S: Jay Howell (10) | Fourth | 2½ out |
| Tuesday, June 9 |
| » Defeated White Sox (22-32), 8-3 | Oakland-Alameda County Stadium (16-15) | 29-27 | Won 2 |
| » W: Curt Young (8-3) L: Jose DeLeon (4-5) | Third | 1½ out |
| Wednesday, June 10 |
| » Defeated White Sox (22-33), 5-2 | Oakland-Alameda County Stadium (17-15) | 30-27 | Won 3 |
| » W: Dennis Eckersley (5-4) L: Neil Allen (0-3) S: Jay Howell (11) | Third | 1½ out |
| Friday, June 12 |
| » Defeated Rangers (24-32), 6-1 | Arlington Stadium (1-0) | 31-27 | Won 4 |
| » W: Dave Stewart (7-6) L: Greg Harris (2-5) | Third | 2 out |
| Saturday, June 13 |
| » Defeated Rangers (24-33), 10-8 | Arlington Stadium (2-0) | 32-27 | Won 5 |
| » W: Steve Ontiveros (2-1) L: Paul Kilgus (0-1) S: Jay Howell (12) | Second | 1 out |
| Sunday, June 14 |
| » Lost to Rangers (25-33), 5-1 | Arlington Stadium (2-1) | 32-28 | |
| » W: Charlie Hough (6-2) L: Eric Plunk (1-3) | Second | 2 out |
| Monday, June 15 |
| » Defeated Royals (31-29), 7-6 | Royals Stadium (1-0) | 33-28 | |
| » W: Dave Leiper (2-0) L: Steve Farr (2-2) S: Jay Howell (13) | Second | 2 out |
| Tuesday, June 16 |
| » Defeated Royals (31-30), 11-1 | Royals Stadium (2-0) | 34-28 | Won 2 |
| » W: Steve Ontiveros (3-1) L: Rick Anderson (0-2) | Second | 2 out |
| Wednesday, June 17 |
| » Lost to Royals (32-30), 10-5 | Royals Stadium (2-1) | 34-29 | |
| » W: Bret Saberhagen (12-1) L: Dave Stewart (7-7) | Second | 2 out |
| Friday, June 19 |
| » Lost to Rangers (28-34), 4-2 | Oakland-Alameda County Stadium (17-16) | 34-30 | Lost 2 |
| » W: Charlie Hough (7-2) L: Moose Haas (2-2) S: Dale Mohorcic (9) | Second | 3 out |
| Saturday, June 20 |
| » Lost to Rangers (29-34), 7-6 | Oakland-Alameda County Stadium (17-17) | 34-31 | Lost 3 |
| » W: Bobby Witt (2-3) L: Curt Young (8-4) S: Mitch Williams (1) | Third | 3 out |
| Sunday, June 21 |
| » Defeated Rangers (29-35), 7-3 | Oakland-Alameda County Stadium (18-17) | 35-31 | |
| » W: Dave Stewart (8-7) L: Jose Guzman (5-6) S: Dennis Eckersley (2) | Third | 3½ out |
| » Lost to Rangers (30-35), 13-3 | Oakland-Alameda County Stadium (18-18) | 35-32 | |
| » W: Ed Correa (2-5) L: Eric Plunk (1-4) S: Jeff Russell (1) | Third | 3½ out |
| Monday, June 22 |
| » Defeated Royals (35-32), 4-1 | Oakland-Alameda County Stadium (19-18) | 36-32 | |
| » W: Steve Ontiveros (4-1) L: Bret Saberhagen (12-2) S: Jay Howell (14) | Second | 3 out |
| Tuesday, June 23 |
| » Lost to Royals (36-32), 4-0 | Oakland-Alameda County Stadium (19-19) | 36-33 | |
| » W: Mark Gubicza (5-8) L: Jose Rijo (0-3) | Third | 4 out |
| Wednesday, June 24 |
| » Defeated Royals (36-33), 4-2 | Oakland-Alameda County Stadium (20-19) | 37-33 | |
| » W: Curt Young (9-4) L: Danny Jackson (3-10) S: Dennis Eckersley (3) | Second | 4 out |
| Friday, June 26 |
| » Defeated Indians (25-46), 5-0 | Cleveland Stadium (1-0) | 38-33 | Won 2 |
| » W: Dave Stewart (9-7) L: Steve Carlton (5-5) S: Gene Nelson (1) | Second | 3½ out |
| Saturday, June 27 |
| » Defeated Indians (25-47), 13-3 | Cleveland Stadium (2-0) | 39-33 | Won 3 |
| » W: Joaquin Andujar (2-1) L: Ken Schrom (4-7) | Second | 2 out |
| Sunday, June 28 |
| » Defeated Indians (25-48), 10-0 | Cleveland Stadium (3-0) | 40-33 | Won 4 |
| » W: Steve Ontiveros (5-1) L: Tom Candiotti (2-9) | Second | 1 out |
| Monday, June 29 |
| » Lost to White Sox (26-46), 5-2 | Comiskey Park I (0-1) | 40-34 | |
| » W: Richard Dotson (5-5) L: Curt Young (9-5) | Second | 1 out |
| Tuesday, June 30 |
| » Lost to White Sox (27-46), 12-3 | Comiskey Park I (0-2) | 40-35 | Lost 2 |
| » W: Scott Nielsen (1-2) L: Jose Rijo (0-4) | Second | 2 out |
| Wednesday, July 1 |
| » Lost to White Sox (28-46), 5-3 | Comiskey Park I (0-3) | 40-36 | Lost 3 |
| » W: Jim Winn (3-4) L: Jay Howell (2-2) | Third | 2 out |
| Thursday, July 2 |
| » Defeated Red Sox (38-40), 5-3 | Oakland-Alameda County Stadium (21-19) | 41-36 | |
| » W: Joaquin Andujar (3-1) L: Al Nipper (7-7) | Third | 1 out |
| Friday, July 3 |
| » Lost to Red Sox (39-40), 2-0 | Oakland-Alameda County Stadium (21-20) | 41-37 | |
| » W: Jeff Sellers (3-1) L: Steve Ontiveros (5-2) | Third | 2 out |
| Saturday, July 4 |
| » Defeated Red Sox (39-41), 9-5 | Oakland-Alameda County Stadium (22-20) | 42-37 | |
| » W: Jose Rijo (1-4) L: Bruce Hurst (9-6) S: Dennis Eckersley (4) | Third | 2 out |
| Sunday, July 5 |
| » Defeated Red Sox (39-42), 6-3 | Oakland-Alameda County Stadium (23-20) | 43-37 | Won 2 |
| » W: Dave Stewart (10-7) L: Oil Can Boyd (1-2) S: Dennis Eckersley (5) | Third | 2 out |
| Monday, July 6 |
| » Defeated Tigers (44-35), 5-3 | Oakland-Alameda County Stadium (24-20) | 44-37 | Won 3 |
| » W: Gene Nelson (4-1) L: Eric King (3-7) S: Jay Howell (15) | Third | 2 out |
| Tuesday, July 7 |
| » Lost to Tigers (45-35), 6-4 | Oakland-Alameda County Stadium (24-21) | 44-38 | |
| » W: Frank Tanana (8-5) L: Joaquin Andujar (3-2) S: Guillermo Hernandez (5) | Third | 2 out |
| Wednesday, July 8 |
| » Lost to Tigers (46-35), 9-5 | Oakland-Alameda County Stadium (24-22) | 44-39 | Lost 2 |
| » W: Jeff Robinson (6-4) L: Steve Ontiveros (5-3) S: Mark Thurmond (5) | Third | 2 out |
| Thursday, July 9 |
| » Lost to Brewers (41-41), 8-3 | Oakland-Alameda County Stadium (24-23) | 44-40 | Lost 3 |
| » W: Chris Bosio (5-2) L: Jose Rijo (1-5) | Third | 3 out |
| Friday, July 10 |
| » Defeated Brewers (41-42), 7-3 | Oakland-Alameda County Stadium (25-23) | 45-40 | |
| » W: Dave Stewart (11-7) L: Mark Knudson (0-1) S: Dennis Eckersley (6) | Second | 2 out |
| Saturday, July 11 |
| » Defeated Brewers (41-43), 6-5 | Oakland-Alameda County Stadium (26-23) | 46-40 | Won 2 |
| » W: Dennis Eckersley (6-4) L: Dan Plesac (4-2) | Second | 2 out |
| Sunday, July 12 |
| » Lost to Brewers (42-43), 4-3 | Oakland-Alameda County Stadium (26-24) | 46-41 | |
| » W: Juan Nieves (6-6) L: Jay Howell (2-3) S: Dan Plesac (18) | Second | 2 out |
| Thursday, July 16 |
| » Defeated Red Sox (41-48), 6-3 | Fenway Park (1-2) | 47-41 | |
| » W: Dave Stewart (12-7) L: Roger Clemens (8-7) S: Dennis Eckersley (7) | Second | 1 out |
| Friday, July 17 |
| » Defeated Red Sox (41-49), 11-6 | Fenway Park (2-2) | 48-41 | Won 2 |
| » W: Greg Cadaret (1-0) L: Bob Stanley (3-9) | Second | 1 out |
| Saturday, July 18 |
| » Lost to Red Sox (42-49), 5-3 | Fenway Park (2-3) | 48-42 | |
| » W: Bruce Hurst (10-6) L: Dennis Eckersley (6-5) | Second | 1 out |
| Sunday, July 19 |
| » Defeated Red Sox (42-50), 5-3 | Fenway Park (3-3) | 49-42 | |
| » W: Jay Howell (3-3) L: Bob Stanley (3-10) S: Bill Caudill (1) | Second | 1 out |
| Monday, July 20 |
| » Lost to Tigers (52-38), 5-4 | Tiger Stadium (2-2) | 49-43 | |
| » W: Mike Henneman (6-0) L: Gene Nelson (4-2) | Second | 1 out |
| Tuesday, July 21 |
| » Lost to Tigers (53-38), 6-5 | Tiger Stadium (2-3) | 49-44 | Lost 2 |
| » W: Eric King (5-7) L: Jay Howell (3-4) | Second | 2 out |
| Wednesday, July 22 |
| » Defeated Tigers (53-39), 10-1 | Tiger Stadium (3-3) | 50-44 | |
| » W: Dennis Lamp (1-0) L: Frank Tanana (9-7) | Second | 2 out |
| Thursday, July 23 |
| » Lost to Brewers (47-46), 12-5 | County Stadium (2-1) | 50-45 | |
| » W: Chris Bosio (6-2) L: Joaquin Andujar (3-3) | Second | 2 out |
| Friday, July 24 |
| » Lost to Brewers (48-46), 10-2 | County Stadium (2-2) | 50-46 | Lost 2 |
| » W: Juan Nieves (7-6) L: Steve Ontiveros (5-4) | Second | 2 out |
| Saturday, July 25 |
| » Defeated Brewers (48-47), 13-4 | County Stadium (3-2) | 51-46 | |
| » W: Curt Young (10-5) L: Mark Knudson (0-2) | Second | 2 out |
| Sunday, July 26 |
| » Lost to Brewers (49-47), 7-4 | County Stadium (3-3) | 51-47 | |
| » W: Teddy Higuera (10-7) L: Dennis Lamp (1-1) S: Dan Plesac (20) | Second | 2 out |
| Monday, July 27 |
| » Defeated Angels (50-50), 6-1 | Oakland-Alameda County Stadium (27-24) | 52-47 | |
| » W: Dave Stewart (13-7) L: Kirk McCaskill (2-3) | Second | 2 out |
| Tuesday, July 28 |
| » Lost to Angels (51-50), 9-2 | Oakland-Alameda County Stadium (27-25) | 52-48 | |
| » W: Mike Witt (13-6) L: Joaquin Andujar (3-4) | Second | 2 out |
| Wednesday, July 29 |
| » Lost to Angels (52-50), 5-4 | Oakland-Alameda County Stadium (27-26) | 52-49 | Lost 2 |
| » W: Don Sutton (7-9) L: Steve Ontiveros (5-5) S: DeWayne Buice (11) | Second | 2 out |
| Friday, July 31 |
| » Lost to Twins (56-48), 5-3 | Oakland-Alameda County Stadium (27-27) | 52-50 | Lost 3 |
| » W: Bert Blyleven (10-8) L: Dennis Lamp (1-2) S: Jeff Reardon (22) | Third | 3 out |
| Saturday, August 1 |
| » Defeated Twins (56-49), 3-2 | Oakland-Alameda County Stadium (28-27) | 53-50 | |
| » W: Dave Stewart (14-7) L: Frank Viola (11-7) | Third | 2 out |
| Sunday, August 2 |
| » Defeated Twins (56-50), 6-5 | Oakland-Alameda County Stadium (29-27) | 54-50 | Won 2 |
| » W: Gene Nelson (5-2) L: Jeff Reardon (5-6) | Second | 1 out |
| Monday, August 3 |
| » Lost to Mariners (51-54), 4-3 | Oakland-Alameda County Stadium (29-28) | 54-51 | |
| » W: Mike Morgan (9-11) L: Joaquin Andujar (3-5) S: Ed Nunez (11) | Second | 2 out |
| Tuesday, August 4 |
| » Defeated Mariners (51-55), 9-3 | Oakland-Alameda County Stadium (30-28) | 55-51 | |
| » W: Steve Ontiveros (6-5) L: Lee Guetterman (9-3) | Second | 1 out |
| Wednesday, August 5 |
| » Defeated Mariners (51-56), 3-1 | Oakland-Alameda County Stadium (31-28) | 56-51 | Won 2 |
| » W: Jose Rijo (2-5) L: Scott Bankhead (7-7) S: Gene Nelson (2) | Second | 1 out |
| Thursday, August 6 |
| » Lost to Twins (58-52), 9-4 | Hubert H. Humphrey Metrodome (0-4) | 56-52 | |
| » W: Frank Viola (12-7) L: Dave Stewart (14-8) | Second | 1 out |
| Friday, August 7 |
| » Lost to Twins (59-52), 9-4 | Hubert H. Humphrey Metrodome (0-5) | 56-53 | Lost 2 |
| » W: Joe Niekro (6-8) L: Dennis Lamp (1-3) | Second | 2 out |
| Saturday, August 8 |
| » Lost to Twins (60-52), 9-2 | Hubert H. Humphrey Metrodome (0-6) | 56-54 | Lost 3 |
| » W: Steve Carlton (6-10) L: Curt Young (10-6) | Second | 3 out |
| Sunday, August 9 |
| » Lost to Twins (61-52), 7-5 | Hubert H. Humphrey Metrodome (0-7) | 56-55 | Lost 4 |
| » W: Bert Blyleven (11-9) L: Steve Ontiveros (6-6) S: Jeff Reardon (23) | Third | 4 out |
| Monday, August 10 |
| » Defeated Mariners (54-58), 15-4 | Kingdome (2-3) | 57-55 | |
| » W: Dave Stewart (15-8) L: Scott Bankhead (7-8) | Second | 3½ out |
| Tuesday, August 11 |
| » Lost to Mariners (55-58), 8-2 | Kingdome (2-4) | 57-56 | |
| » W: Mike Moore (5-14) L: Jose Rijo (2-6) | Second | 4½ out |
| Wednesday, August 12 |
| » Lost to Mariners (56-58), 4-3 | Kingdome (2-5) | 57-57 | Lost 2 |
| » W: Mark Langston (13-9) L: Gene Nelson (5-3) S: Bill Wilkinson (6) | Fourth | 4½ out |
| Friday, August 14 |
| » Defeated Angels (59-57), 7-6 | Anaheim Stadium (3-1) | 58-57 | |
| » W: Rick Rodriguez (1-0) L: DeWayne Buice (5-4) S: Dennis Eckersley (8) | Third | 4 out |
| Saturday, August 15 |
| » Defeated Angels (59-58), 13-3 | Anaheim Stadium (4-1) | 59-57 | Won 2 |
| » W: Dave Stewart (16-8) L: John Candelaria (6-5) | Second | 4 out |
| Sunday, August 16 |
| » Defeated Angels (59-59), 9-6 | Anaheim Stadium (5-1) | 60-57 | Won 3 |
| » W: Greg Cadaret (2-0) L: Chuck Finley (2-5) S: Dennis Eckersley (9) | Second | 4 out |
| Monday, August 17 |
| » Lost to Angels (60-59), 6-4 | Anaheim Stadium (5-2) | 60-58 | |
| » W: Mike Witt (15-8) L: Dave Leiper (2-1) S: DeWayne Buice (13) | Second | 5 out |
| Tuesday, August 18 |
| » Lost to Blue Jays (71-48), 2-1 | Oakland-Alameda County Stadium (31-29) | 60-59 | Lost 2 |
| » W: Dave Stieb (13-5) L: Dennis Eckersley (6-6) S: Tom Henke (28) | Second | 5 out |
| Wednesday, August 19 |
| » Defeated Blue Jays (71-49), 7-3 | Oakland-Alameda County Stadium (32-29) | 61-59 | |
| » W: Dave Stewart (17-8) L: John Cerutti (9-3) | Second | 4 out |
| Thursday, August 20 |
| » Lost to Blue Jays (72-49), 7-6 | Oakland-Alameda County Stadium (32-30) | 61-60 | |
| » W: Gary Lavelle (2-3) L: Greg Cadaret (2-1) S: Tom Henke (29) | Second | 4 out |
| Friday, August 21 |
| » Defeated Yankees (69-53), 6-4 | Oakland-Alameda County Stadium (33-30) | 62-60 | |
| » W: Steve Ontiveros (7-6) L: Ron Guidry (3-8) S: Jay Howell (16) | Second | 3 out |
| Saturday, August 22 |
| » Defeated Yankees (69-54), 6-0 | Oakland-Alameda County Stadium (34-30) | 63-60 | Won 2 |
| » W: Gene Nelson (6-3) L: Steve Trout (6-7) | Second | 2 out |
| Sunday, August 23 |
| » Lost to Yankees (70-54), 4-0 | Oakland-Alameda County Stadium (34-31) | 63-61 | |
| » W: Rick Rhoden (15-8) L: Dave Stewart (17-9) S: Tim Stoddard (6) | Second | 2 out |
| Monday, August 24 |
| » Defeated Orioles (57-68), 7-3 | Oakland-Alameda County Stadium (35-31) | 64-61 | |
| » W: Greg Cadaret (3-1) L: Mike Boddicker (9-7) | Second | 2 out |
| Tuesday, August 25 |
| » Defeated Orioles (57-69), 9-7 | Oakland-Alameda County Stadium (36-31) | 65-61 | Won 2 |
| » W: Curt Young (11-6) L: Eric Bell (9-10) S: Eric Plunk (1) | Second | 1 out |
| Thursday, August 27 |
| » Lost to Blue Jays (76-51), 9-4 | Exhibition Stadium (2-1) | 65-62 | |
| » W: Jimmy Key (15-6) L: Greg Cadaret (3-2) | Second | 1 out |
| Friday, August 28 |
| » Defeated Blue Jays (76-52), 3-2 | Exhibition Stadium (3-1) | 66-62 | |
| » W: Dave Stewart (18-9) L: Dave Stieb (13-7) S: Dennis Eckersley (10) | First | -- |
| Saturday, August 29 |
| » Defeated Blue Jays (76-53), 6-5 | Exhibition Stadium (4-1) | 67-62 | Won 2 |
| » W: Eric Plunk (2-4) L: Mark Eichhorn (10-6) S: Dennis Eckersley (11) | Second | 1 out |
| Sunday, August 30 |
| » Lost to Blue Jays (77-53), 13-3 | Exhibition Stadium (4-2) | 67-63 | |
| » W: Jim Clancy (12-10) L: Jose Rijo (2-7) | Second | 1 out |
| Monday, August 31 |
| » Lost to Yankees (74-57), 4-1 | Yankee Stadium (2-2) | 67-64 | Lost 2 |
| » W: Ron Guidry (4-8) L: Curt Young (11-7) S: Tim Stoddard (7) | Second | 1½ out |
| Tuesday, September 1 |
| » Defeated Yankees (74-58), 8-3 | Yankee Stadium (3-2) | 68-64 | |
| » W: Steve Ontiveros (8-6) L: Charles Hudson (9-5) | Second | ½ out |
| Wednesday, September 2 |
| » Lost to Yankees (75-58), 3-2 | Yankee Stadium (3-3) | 68-65 | |
| » W: Dave Righetti (7-3) L: Rick Honeycutt (2-13) | Second | 1½ out |
| Friday, September 4 |
| » Lost to Orioles (61-73), 5-2 | Memorial Stadium (2-2) | 68-66 | Lost 2 |
| » W: Mike Boddicker (10-7) L: Gene Nelson (6-4) | Second | 3 out |
| Saturday, September 5 |
| » Defeated Orioles (61-74), 7-2 | Memorial Stadium (3-2) | 69-66 | |
| » W: Curt Young (12-7) L: Eric Bell (9-12) | Second | 3 out |
| Sunday, September 6 |
| » Lost to Orioles (62-74), 7-6 | Memorial Stadium (3-3) | 69-67 | |
| » W: Tom Niedenfuer (4-3) L: Dennis Eckersley (6-7) | Second | 3 out |
| Monday, September 7 |
| » Defeated Rangers (64-73), 2-1 | Oakland-Alameda County Stadium (37-31) | 70-67 | |
| » W: Dave Stewart (19-9) L: Mitch Williams (7-4) | Second | 3 out |
| Tuesday, September 8 |
| » Lost to Rangers (65-73), 12-1 | Oakland-Alameda County Stadium (37-32) | 70-68 | |
| » W: Charlie Hough (15-11) L: Gene Nelson (6-5) | Second | 3 out |
| » Major-league debuts: Dave Otto (Athletics) |
| Wednesday, September 9 |
| » Defeated Rangers (65-74), 11-7 | Oakland-Alameda County Stadium (38-32) | 71-68 | |
| » W: Greg Cadaret (4-2) L: Bobby Witt (7-9) | Second | 3 out |
| Thursday, September 10 |
| » Defeated Royals (69-71), 3-2 | Oakland-Alameda County Stadium (39-32) | 72-68 | Won 2 |
| » W: Eric Plunk (3-4) L: John Davis (3-2) | Second | 2½ out |
| Friday, September 11 |
| » Lost to Royals (70-71), 9-0 | Oakland-Alameda County Stadium (39-33) | 72-69 | |
| » W: Bret Saberhagen (17-8) L: Steve Ontiveros (8-7) | Second | 3½ out |
| Saturday, September 12 |
| » Lost to Royals (71-71), 10-7 | Oakland-Alameda County Stadium (39-34) | 72-70 | Lost 2 |
| » W: Charlie Leibrandt (15-10) L: Dave Stewart (19-10) S: Gene Garber (12) | Second | 3½ out |
| Sunday, September 13 |
| » Lost to Royals (72-71), 6-5 | Oakland-Alameda County Stadium (39-35) | 72-71 | Lost 3 |
| » W: Mark Gubicza (11-16) L: Rick Honeycutt (2-14) S: Gene Garber (13) | Second | 4½ out |
| Monday, September 14 |
| » Lost to Rangers (69-75), 2-1 | Arlington Stadium (2-2) | 72-72 | Lost 4 |
| » W: Dale Mohorcic (7-4) L: Steve Ontiveros (8-8) | Third | 4½ out |
| Tuesday, September 15 |
| » Defeated Rangers (69-76), 6-5 | Arlington Stadium (3-2) | 73-72 | |
| » W: Eric Plunk (4-4) L: Dale Mohorcic (7-5) S: Dennis Eckersley (12) | Second | 3½ out |
| Wednesday, September 16 |
| » Lost to Rangers (70-76), 4-1 | Arlington Stadium (3-3) | 73-73 | |
| » W: Charlie Hough (17-11) L: Dave Stewart (19-11) | Second | 3½ out |
| Friday, September 18 |
| » Defeated Royals (74-74), 4-0 | Royals Stadium (3-1) | 74-73 | |
| » W: Steve Ontiveros (9-8) L: Mark Gubicza (11-17) S: Dennis Eckersley (13) | Second | 3½ out |
| Saturday, September 19 |
| » Defeated Royals (74-75), 9-5 | Royals Stadium (4-1) | 75-73 | Won 2 |
| » W: Storm Davis (3-7) L: Melido Perez (1-1) | Second | 3½ out |
| Sunday, September 20 |
| » Defeated Royals (74-76), 7-6 | Royals Stadium (5-1) | 76-73 | Won 3 |
| » W: Curt Young (13-7) L: Danny Jackson (8-18) S: Dennis Eckersley (14) | Second | 3½ out |
| Monday, September 21 |
| » Lost to Indians (57-94), 6-3 | Cleveland Stadium (3-1) | 76-74 | |
| » |