| Tuesday, February 22 |
| Future Mariner J.J. Putz is born in Trenton, MI. |
| Thursday, March 10 |
| Future Mariner Ben Davis is born in Chester, PA. |
| Wednesday, April 6 |
| » Lost to Angels (1-0), 7-0 | Kingdome (0-1) | 0-1 | |
| » W: Frank Tanana (1-0) L: Diego Segui (0-1) | Third | 1 out |
| » Major-league debuts: Jose Baez (Mariners) |
| Thursday, April 7 |
| » Lost to Angels (2-0), 2-0 | Kingdome (0-2) | 0-2 | Lost 2 |
| » W: Nolan Ryan (1-0) L: Enrique Romo (0-1) | Fifth | 2 out |
| » Major-league debuts: Enrique Romo (Mariners) |
| Friday, April 8 |
| » Defeated Angels (2-1), 7-6 | Kingdome (1-2) | 1-2 | |
| » W: Bill Laxton (1-0) L: John Verhoeven (0-1) | Fourth | 1 out |
| Saturday, April 9 |
| » Defeated Angels (2-2), 5-1 | Kingdome (2-2) | 2-2 | Won 2 |
| » W: Gary Wheelock (1-0) L: Wayne Simpson (0-1) S: John Montague (1) | Fourth | 1 out |
| Sunday, April 10 |
| » Lost to Angels (3-2), 12-5 | Kingdome (2-3) | 2-3 | |
| » W: Frank Tanana (2-0) L: Glenn Abbott (0-1) | Fourth | 2 out |
| Monday, April 11 |
| » Lost to Twins (2-2), 12-3 | Kingdome (2-4) | 2-4 | Lost 2 |
| » W: Geoff Zahn (1-0) L: Diego Segui (0-2) | Sixth | 3 out |
| Tuesday, April 12 |
| » Lost to Twins (3-2), 3-2 | Kingdome (2-5) | 2-5 | Lost 3 |
| » W: Ron Schueler (1-1) L: Bill Laxton (1-1) S: Tom Burgmeier (2) | Sixth | 3½ out |
| Wednesday, April 13 |
| » Defeated Twins (3-3), 3-2 | Kingdome (3-5) | 3-5 | |
| » W: Tommy Moore (1-0) L: Tom Burgmeier (0-1) | Fifth | 3 out |
| Thursday, April 14 |
| » Defeated Twins (3-4), 4-3 | Kingdome (4-5) | 4-5 | Won 2 |
| » W: Gary Wheelock (2-0) L: Pete Redfern (0-2) S: John Montague (2) | Fourth | 3 out |
| Friday, April 15 |
| » Lost to Angels (4-6), 7-0 | Anaheim Stadium (0-1) | 4-6 | |
| » W: Nolan Ryan (2-1) L: Glenn Abbott (0-2) | Fourth | 4 out |
| Saturday, April 16 |
| » Lost to Angels (5-6), 6-4 | Anaheim Stadium (0-2) | 4-7 | Lost 2 |
| » W: Paul Hartzell (1-0) L: John Montague (0-1) S: Don Kirkwood (1) | Seventh | 3 out |
| Sunday, April 17 |
| » Defeated Angels (5-7), 11-7 | Anaheim Stadium (1-2) | 5-7 | |
| » W: Mike Kekich (1-0) L: Sid Monge (0-1) S: Dave Pagan (1) | Sixth | 3 out |
| Monday, April 18 |
| » Defeated Rangers (4-4), 8-6 | Kingdome (5-5) | 6-7 | Won 2 |
| » W: Stan Thomas (1-0) L: Doyle Alexander (1-1) S: Bill Laxton (1) | Sixth | 2½ out |
| Tuesday, April 19 |
| » Lost to Rangers (5-4), 3-1 | Kingdome (5-6) | 6-8 | |
| » W: Paul Lindblad (1-0) L: Gary Wheelock (2-1) | Seventh | 2½ out |
| Future Mariner George Sherrill is born in Memphis, TN. |
| Wednesday, April 20 |
| » Lost to Rangers (6-4), 5-2 | Kingdome (5-7) | 6-9 | Lost 2 |
| » W: Nelson Briles (1-0) L: John Montague (0-2) S: Adrian Devine (1) | Seventh | 3½ out |
| Friday, April 22 |
| » Lost to Royals (7-5), 6-5 | Kingdome (5-8) | 6-10 | Lost 3 |
| » W: Mark Littell (2-1) L: Dave Pagan (0-1) S: Larry Gura (2) | Seventh | 4½ out |
| Saturday, April 23 |
| » Lost to Royals (8-5), 8-6 | Kingdome (5-9) | 6-11 | Lost 4 |
| » W: Dennis Leonard (1-0) L: Diego Segui (0-3) S: Larry Gura (3) | Seventh | 4½ out |
| Sunday, April 24 |
| » Lost to Royals (9-5), 16-1 | Kingdome (5-10) | 6-12 | Lost 5 |
| » W: Jim Colborn (3-1) L: Gary Wheelock (2-2) | Seventh | 4½ out |
| » Defeated Royals (9-6), 4-2 | Kingdome (6-10) | 7-12 | |
| » W: John Montague (1-2) L: Paul Splittorff (1-1) | Seventh | 4½ out |
| Tuesday, April 26 |
| » Lost to Twins (11-7), 5-3 | Metropolitan Stadium (0-1) | 7-13 | |
| » W: Tom Burgmeier (2-1) L: Stan Thomas (1-1) S: Tom Johnson (2) | Sixth | 5½ out |
| Wednesday, April 27 |
| » Lost to Twins (12-7), 5-3 | Metropolitan Stadium (0-2) | 7-14 | Lost 2 |
| » W: Tom Johnson (3-0) L: Tommy Moore (1-1) S: Tom Burgmeier (3) | Sixth | 6 out |
| Thursday, April 28 |
| » Defeated Twins (12-8), 4-3 | Metropolitan Stadium (1-2) | 8-14 | |
| » W: John Montague (2-2) L: Dave Goltz (0-2) | Seventh | 5½ out |
| Friday, April 29 |
| » Lost to Yankees (10-9), 3-0 | Yankee Stadium (0-1) | 8-15 | |
| » W: Ron Guidry (2-0) L: Stan Thomas (1-2) S: Sparky Lyle (5) | Seventh | 5½ out |
| Saturday, April 30 |
| » Lost to Yankees (11-9), 7-2 | Yankee Stadium (0-2) | 8-16 | Lost 2 |
| » W: Ed Figueroa (2-2) L: Gary Wheelock (2-3) | Sixth | 6 out |
| Sunday, May 1 |
| » Lost to Yankees (12-9), 5-2 | Yankee Stadium (0-3) | 8-17 | Lost 3 |
| » W: Ken Holtzman (2-1) L: Glenn Abbott (0-3) S: Sparky Lyle (6) | Seventh | 7 out |
| Tuesday, May 3 |
| » Defeated Red Sox (10-10), 10-8 | Fenway Park (1-0) | 9-17 | |
| » W: John Montague (3-2) L: Rick Wise (1-2) S: Dave Pagan (2) | Seventh | 7 out |
| Wednesday, May 4 |
| » Lost to Red Sox (11-10), 5-2 | Fenway Park (1-1) | 9-18 | |
| » W: Reggie Cleveland (2-2) L: Stan Thomas (1-3) S: Bill Campbell (3) | Seventh | 7 out |
| Thursday, May 5 |
| » Lost to Red Sox (12-10), 5-2 | Fenway Park (1-2) | 9-19 | Lost 2 |
| » W: Fergie Jenkins (4-1) L: Diego Segui (0-4) | Seventh | 7½ out |
| Friday, May 6 |
| » Lost to Orioles (12-9), 4-1 | Memorial Stadium (0-1) | 9-20 | Lost 3 |
| » W: Ross Grimsley (3-1) L: Glenn Abbott (0-4) | Seventh | 8½ out |
| Saturday, May 7 |
| » Lost to Orioles (13-9), 4-2 | Memorial Stadium (0-2) | 9-21 | Lost 4 |
| » W: Rudy May (3-3) L: Rick Jones (0-1) S: Mike Flanagan (1) | Seventh | 9½ out |
| Sunday, May 8 |
| » Lost to Orioles (14-9), 6-4 | Memorial Stadium (0-3) | 9-22 | Lost 5 |
| » W: Jim Palmer (5-1) L: Dick Pole (0-1) S: Scott McGregor (1) | Seventh | 10½ out |
| Monday, May 9 |
| » Lost to Blue Jays (13-17), 10-4 | Exhibition Stadium (0-1) | 9-23 | Lost 6 |
| » W: Bill Singer (2-4) L: Stan Thomas (1-4) | Seventh | 11 out |
| Tuesday, May 10 |
| » Lost to Blue Jays (14-17), 9-3 | Exhibition Stadium (0-2) | 9-24 | Lost 7 |
| » W: Jerry Garvin (5-0) L: John Montague (3-3) | Sixth | 12 out |
| Wednesday, May 11 |
| » Defeated Yankees (16-11), 5-2 | Kingdome (7-10) | 10-24 | |
| » W: Bill Laxton (2-1) L: Ken Holtzman (2-2) S: Enrique Romo (1) | Seventh | 11 out |
| Thursday, May 12 |
| » Defeated Yankees (16-12), 8-6 | Kingdome (8-10) | 11-24 | Won 2 |
| » W: Tommy Moore (2-1) L: Catfish Hunter (1-2) | Seventh | 10½ out |
| Friday, May 13 |
| » Lost to Red Sox (15-13), 7-5 | Kingdome (8-11) | 11-25 | |
| » W: Jim Willoughby (3-0) L: Enrique Romo (0-2) S: Bill Campbell (4) | Sixth | 11½ out |
| Saturday, May 14 |
| » Lost to Red Sox (16-13), 8-4 | Kingdome (8-12) | 11-26 | Lost 2 |
| » W: Bob Stanley (3-0) L: Stan Thomas (1-5) S: Bill Campbell (5) | Seventh | 12½ out |
| Sunday, May 15 |
| » Lost to Red Sox (17-13), 5-4 | Kingdome (8-13) | 11-27 | Lost 3 |
| » W: Bill Lee (1-0) L: Rick Jones (0-2) S: Bill Campbell (6) | Seventh | 13½ out |
| Monday, May 16 |
| » Defeated Orioles (17-12), 8-3 | Kingdome (9-13) | 12-27 | |
| » W: Glenn Abbott (1-4) L: Jim Palmer (5-3) S: Mike Kekich (1) | Seventh | 13½ out |
| Tuesday, May 17 |
| » Defeated Orioles (17-13), 10-2 | Kingdome (10-13) | 13-27 | Won 2 |
| » W: Enrique Romo (1-2) L: Rudy May (4-4) | Seventh | 13½ out |
| Thursday, May 19 |
| » Defeated Athletics (17-19), 3-0 | Oakland-Alameda County Stadium (1-0) | 14-27 | Won 3 |
| » W: Dave Pagan (1-1) L: Rick Langford (3-3) | Seventh | 12½ out |
| Friday, May 20 |
| » Lost to Athletics (18-19), 14-5 | Oakland-Alameda County Stadium (1-1) | 14-28 | |
| » W: Doc Medich (3-2) L: Rick Jones (0-3) | Seventh | 12½ out |
| Saturday, May 21 |
| » Defeated Athletics (18-20), 7-6 | Oakland-Alameda County Stadium (2-1) | 15-28 | |
| » W: Mike Kekich (2-0) L: Bob Lacey (1-1) | Seventh | 11½ out |
| Sunday, May 22 |
| » Defeated Athletics (18-21), 6-2 | Oakland-Alameda County Stadium (3-1) | 16-28 | Won 2 |
| » W: Dick Pole (1-1) L: Vida Blue (3-4) S: Enrique Romo (2) | Seventh | 11½ out |
| Tuesday, May 24 |
| » Lost to Indians (15-21), 7-5 | Cleveland Stadium (0-1) | 16-29 | |
| » W: Rick Waits (2-0) L: Enrique Romo (1-3) S: Jim Kern (4) | Seventh | 12 out |
| Wednesday, May 25 |
| » Lost to Indians (16-21), 2-1 | Cleveland Stadium (0-2) | 16-30 | Lost 2 |
| » W: Dennis Eckersley (4-3) L: Bill Laxton (2-2) | Seventh | 13½ out |
| Friday, May 27 |
| » Defeated Tigers (17-23), 2-1 | Tiger Stadium (1-0) | 17-30 | |
| » W: Glenn Abbott (2-4) L: Mark Fidrych (0-1) S: Mike Kekich (2) | Seventh | 12½ out |
| Saturday, May 28 |
| » Defeated Tigers (17-24), 3-1 | Tiger Stadium (2-0) | 18-30 | Won 2 |
| » W: Dick Pole (2-1) L: Dave Rozema (4-2) S: Bill Laxton (2) | Seventh | 11½ out |
| Sunday, May 29 |
| » Defeated Tigers (17-25), 6-4 | Tiger Stadium (3-0) | 19-30 | Won 3 |
| » W: Stan Thomas (2-5) L: Steve Foucault (3-2) | Seventh | 11½ out |
| Monday, May 30 |
| » Defeated Rangers (21-20), 7-4 | Arlington Stadium (1-0) | 20-30 | Won 4 |
| » W: Enrique Romo (2-3) L: Bert Blyleven (4-6) S: Bill Laxton (3) | Seventh | 10 out |
| » Defeated Rangers (21-21), 9-3 | Arlington Stadium (2-0) | 21-30 | Won 5 |
| » W: John Montague (4-3) L: Gaylord Perry (4-5) S: Diego Segui (1) | Seventh | 10 out |
| Wednesday, June 1 |
| » Lost to Athletics (23-24), 6-3 | Kingdome (10-14) | 21-31 | |
| » W: Doc Medich (5-2) L: Glenn Abbott (2-5) S: Joe Coleman (2) | Seventh | 11½ out |
| Thursday, June 2 |
| » Lost to Athletics (24-24), 1-0 | Kingdome (10-15) | 21-32 | Lost 2 |
| » W: Mike Norris (2-1) L: Dick Pole (2-2) | Seventh | 11½ out |
| Friday, June 3 |
| » Lost to Indians (21-24), 7-1 | Kingdome (10-16) | 21-33 | Lost 3 |
| » W: Dennis Eckersley (6-3) L: Rick Jones (0-4) S: Jim Kern (5) | Seventh | 12½ out |
| Saturday, June 4 |
| » Lost to Indians (22-24), 7-5 | Kingdome (10-17) | 21-34 | Lost 4 |
| » W: Rick Waits (3-0) L: Mike Kekich (2-1) S: Sid Monge (3) | Seventh | 12½ out |
| Sunday, June 5 |
| » Defeated Indians (22-25), 6-1 | Kingdome (11-17) | 22-34 | |
| » W: John Montague (5-3) L: Jim Bibby (4-3) | Seventh | 11½ out |
| Tuesday, June 7 |
| » Lost to Tigers (22-28), 5-2 | Kingdome (11-18) | 22-35 | |
| » W: Dave Rozema (6-2) L: Glenn Abbott (2-6) S: Steve Foucault (5) | Sixth | 12 out |
| Wednesday, June 8 |
| » Defeated Tigers (22-29), 3-2 | Kingdome (12-18) | 23-35 | |
| » W: Mike Kekich (3-1) L: John Hiller (3-6) | Seventh | 12 out |
| Thursday, June 9 |
| » Defeated Tigers (22-30), 2-1 | Kingdome (13-18) | 24-35 | Won 2 |
| » W: Enrique Romo (3-3) L: Bob Sykes (0-2) | Sixth | 11 out |
| Friday, June 10 |
| » Lost to Blue Jays (22-31), 4-3 | Kingdome (13-19) | 24-36 | |
| » W: Dave Lemanczyk (4-5) L: John Montague (5-4) S: Mike Willis (4) | Sixth | 11 out |
| Saturday, June 11 |
| » Lost to Blue Jays (23-31), 5-4 | Kingdome (13-20) | 24-37 | Lost 2 |
| » W: Jerry Johnson (2-2) L: Enrique Romo (3-4) | Seventh | 11 out |
| Sunday, June 12 |
| » Defeated Blue Jays (23-32), 5-2 | Kingdome (14-20) | 25-37 | |
| » W: Dick Pole (3-2) L: Pete Vuckovich (2-5) | Sixth | 11 out |
| Tuesday, June 14 |
| » Lost to Athletics (28-29), 6-3 | Kingdome (14-21) | 25-38 | |
| » W: Pablo Torrealba (3-0) L: Tom House (1-1) S: Bob Lacey (3) | Seventh | 11 out |
| Wednesday, June 15 |
| » Defeated Athletics (28-30), 6-5 | Kingdome (15-21) | 26-38 | |
| » W: Mike Kekich (4-1) L: Pablo Torrealba (3-1) | Sixth | 11 out |
| Thursday, June 16 |
| » Defeated Athletics (28-31), 3-1 | Kingdome (16-21) | 27-38 | Won 2 |
| » W: Glenn Abbott (3-6) L: Rick Langford (4-5) | Sixth | 11 out |
| Friday, June 17 |
| » Defeated Rangers (29-28), 2-1 | Arlington Stadium (3-0) | 28-38 | Won 3 |
| » W: Dick Pole (4-2) L: Mike Marshall (2-1) S: Tom House (1) | Seventh | 10½ out |
| » Lost to Rangers (30-28), 8-6 | Arlington Stadium (3-1) | 28-39 | |
| » W: Nelson Briles (3-3) L: Gary Wheelock (2-4) S: Adrian Devine (3) | Seventh | 10½ out |
| Saturday, June 18 |
| » Defeated Rangers (30-29), 6-1 | Arlington Stadium (4-1) | 29-39 | |
| » W: Rick Jones (1-4) L: Bert Blyleven (6-8) | Seventh | 9½ out |
| Sunday, June 19 |
| » Defeated Rangers (30-30), 2-1 | Arlington Stadium (5-1) | 30-39 | Won 2 |
| » W: Enrique Romo (4-4) L: Gaylord Perry (6-6) | Seventh | 8½ out |
| Monday, June 20 |
| » Defeated Royals (31-32), 4-2 | Royals Stadium (1-0) | 31-39 | Won 3 |
| » W: Gary Wheelock (3-4) L: Dennis Leonard (4-8) S: Enrique Romo (3) | Sixth | 7½ out |
| Tuesday, June 21 |
| » Lost to Royals (32-32), 13-3 | Royals Stadium (1-1) | 31-40 | |
| » W: Jim Colborn (8-7) L: Glenn Abbott (3-7) | Sixth | 8½ out |
| Wednesday, June 22 |
| » Lost to Royals (33-32), 4-3 | Royals Stadium (1-2) | 31-41 | Lost 2 |
| » W: Doug Bird (3-1) L: Dick Pole (4-3) S: Mark Littell (8) | Seventh | 9½ out |
| Thursday, June 23 |
| » Defeated Royals (33-33), 8-6 | Royals Stadium (2-2) | 32-41 | |
| » W: Enrique Romo (5-4) L: Mark Littell (5-3) | Sixth | 8½ out |
| Friday, June 24 |
| » Lost to Brewers (34-35), 7-1 | County Stadium (0-1) | 32-42 | |
| » W: Lary Sorensen (1-1) L: John Montague (5-5) | Seventh | 9½ out |
| Saturday, June 25 |
| » Defeated Brewers (34-36), 8-3 | County Stadium (1-1) | 33-42 | |
| » W: Gary Wheelock (4-4) L: Moose Haas (4-5) S: Enrique Romo (4) | Fifth | 8½ out |
| Sunday, June 26 |
| » Lost to Brewers (35-36), 8-6 | County Stadium (1-2) | 33-43 | |
| » W: Mike Caldwell (1-0) L: Enrique Romo (5-5) | Seventh | 9½ out |
| Monday, June 27 |
| » Lost to White Sox (39-31), 10-4 | Comiskey Park I (0-1) | 33-44 | Lost 2 |
| » W: Ken Kravec (3-2) L: Dick Pole (4-4) S: Bart Johnson (1) | Seventh | 10½ out |
| Tuesday, June 28 |
| » Lost to White Sox (40-31), 10-4 | Comiskey Park I (0-2) | 33-45 | Lost 3 |
| » W: Francisco Barrios (7-3) L: John Montague (5-6) | Seventh | 11½ out |
| Wednesday, June 29 |
| » Defeated White Sox (40-32), 3-1 | Comiskey Park I (1-2) | 34-45 | |
| » W: Tom House (2-1) L: Wilbur Wood (1-2) S: Enrique Romo (5) | Seventh | 10½ out |
| Friday, July 1 |
| » Lost to Brewers (37-38), 2-1 | Kingdome (16-22) | 34-46 | |
| » W: Moose Haas (5-5) L: Gary Wheelock (4-5) | Seventh | 10½ out |
| Saturday, July 2 |
| » Defeated Brewers (37-39), 2-1 | Kingdome (17-22) | 35-46 | |
| » W: Glenn Abbott (4-7) L: Jim Slaton (6-7) S: Mike Kekich (3) | Seventh | 10½ out |
| Sunday, July 3 |
| » Lost to Brewers (38-39), 10-3 | Kingdome (17-23) | 35-47 | |
| » W: Jerry Augustine (9-9) L: Dick Pole (4-5) | Seventh | 12 out |
| Monday, July 4 |
| » Lost to White Sox (45-32), 6-2 | Kingdome (17-24) | 35-48 | Lost 2 |
| » W: Francisco Barrios (8-3) L: John Montague (5-7) | Seventh | 13 out |
| » Major-league debuts: Julio Cruz (Mariners) |
| Tuesday, July 5 |
| » Lost to White Sox (46-32), 4-1 | Kingdome (17-25) | 35-49 | Lost 3 |
| » W: Steve Stone (9-6) L: Tom House (2-2) S: Lerrin LaGrow (13) | Seventh | 14 out |
| Wednesday, July 6 |
| » Lost to White Sox (47-32), 4-2 | Kingdome (17-26) | 35-50 | Lost 4 |
| » W: Wilbur Wood (3-2) L: Gary Wheelock (4-6) | Seventh | 15 out |
| Friday, July 8 |
| » Defeated Twins (46-37), 13-11 | Metropolitan Stadium (2-2) | 36-50 | |
| » W: Bill Laxton (3-2) L: Paul Thormodsgard (6-5) S: Enrique Romo (6) | Seventh | 15 out |
| Saturday, July 9 |
| » Defeated Twins (46-38), 5-2 | Metropolitan Stadium (3-2) | 37-50 | Won 2 |
| » W: Dick Pole (5-5) L: Dave Goltz (9-6) S: Enrique Romo (7) | Seventh | 15 out |
| Future Mariner Justin Leone is born in Las Vegas, NV. |
| Sunday, July 10 |
| » Lost to Twins (47-38), 15-0 | Metropolitan Stadium (3-3) | 37-51 | |
| » W: Geoff Zahn (7-7) L: Stan Thomas (2-6) | Seventh | 15 out |
| Monday, July 11 |
| » Lost to Athletics (36-48), 8-1 | Oakland-Alameda County Stadium (3-2) | 37-52 | Lost 2 |
| » W: Joe Coleman (1-0) L: Tom House (2-3) S: Bob Lacey (5) | Seventh | 16 out |
| Tuesday, July 12 |
| » Lost to Athletics (37-48), 3-2 | Oakland-Alameda County Stadium (3-3) | 37-53 | Lost 3 |
| » W: Vida Blue (7-11) L: Enrique Romo (5-6) | Seventh | 16 out |
| Wednesday, July 13 |
| » Defeated Athletics (37-49), 3-1 | Oakland-Alameda County Stadium (4-3) | 38-53 | |
| » W: Glenn Abbott (5-7) L: Rick Langford (7-8) | Seventh | 15½ out |
| Thursday, July 14 |
| » Defeated Angels (41-44), 4-1 | Anaheim Stadium (2-2) | 39-53 | Won 2 |
| » W: Dick Pole (6-5) L: Ken Brett (6-8) S: Enrique Romo (8) | Seventh | 15½ out |
| Friday, July 15 |
| » Defeated Angels (41-45), 6-2 | Anaheim Stadium (3-2) | 40-53 | Won 3 |
| » W: Tom House (3-3) L: Gary Nolan (4-3) | Seventh | 15½ out |
| Saturday, July 16 |
| » Lost to Angels (42-45), 5-4 | Anaheim Stadium (3-3) | 40-54 | |
| » W: Nolan Ryan (13-8) L: Enrique Romo (5-7) | Seventh | 15½ out |
| Sunday, July 17 |
| » Defeated Angels (42-46), 8-7 | Anaheim Stadium (4-3) | 41-54 | |
| » W: Mike Kekich (5-1) L: Dave LaRoche (6-3) | Seventh | 15½ out |
| Thursday, July 21 |
| » Defeated Athletics (39-52), 4-3 | Kingdome (18-26) | 42-54 | Won 2 |
| » W: Glenn Abbott (6-7) L: Rick Langford (7-10) S: Enrique Romo (9) | Sixth | 15 out |
| Friday, July 22 |
| » Lost to Athletics (40-52), 5-3 | Kingdome (18-27) | 42-55 | |
| » W: Vida Blue (9-11) L: Dick Pole (6-6) S: Bob Lacey (6) | Seventh | 16 out |
| Saturday, July 23 |
| » Defeated Athletics (40-53), 10-3 | Kingdome (19-27) | 43-55 | |
| » W: Gary Wheelock (5-6) L: Mike Norris (2-7) | Sixth | 16 out |
| Sunday, July 24 |
| » Lost to Angels (44-48), 3-1 | Kingdome (19-28) | 43-56 | |
| » W: Paul Hartzell (4-6) L: Tom House (3-4) S: Dyar Miller (3) | Sixth | 17½ out |
| » Lost to Angels (45-48), 4-3 | Kingdome (19-29) | 43-57 | Lost 2 |
| » W: Wayne Simpson (5-7) L: Bob Galasso (0-1) S: Dave LaRoche (10) | Sixth | 17½ out |
| Monday, July 25 |
| » Lost to Angels (46-48), 7-2 | Kingdome (19-30) | 43-58 | Lost 3 |
| » W: Nolan Ryan (14-9) L: Dick Pole (6-7) | Sixth | 18½ out |
| Tuesday, July 26 |
| » Defeated Twins (55-44), 9-7 | Kingdome (20-30) | 44-58 | |
| » W: Glenn Abbott (7-7) L: Paul Thormodsgard (7-8) S: Diego Segui (2) | Sixth | 18½ out |
| Wednesday, July 27 |
| » Lost to Twins (56-44), 4-1 | Kingdome (20-31) | 44-59 | |
| » W: Pete Redfern (4-5) L: Tom House (3-5) | Sixth | 18½ out |
| Thursday, July 28 |
| » Defeated Twins (56-45), 5-2 | Kingdome (21-31) | 45-59 | |
| » W: Gary Wheelock (6-6) L: Geoff Zahn (9-8) S: John Montague (3) | Sixth | 18 out |
| Friday, July 29 |
| » Lost to Orioles (58-43), 5-4 | Kingdome (21-32) | 45-60 | |
| » W: Dick Drago (4-3) L: Mike Kekich (5-2) | Sixth | 19 out |
| Saturday, July 30 |
| » Lost to Orioles (59-43), 5-3 | Kingdome (21-33) | 45-61 | Lost 2 |
| » W: Dennis Martinez (9-6) L: John Montague (5-8) | Sixth | 20 out |
| Sunday, July 31 |
| » Defeated Orioles (59-44), 6-1 | Kingdome (22-33) | 46-61 | |
| » W: Glenn Abbott (8-7) L: Jim Palmer (12-9) | Sixth | 19½ out |
| Tuesday, August 2 |
| » Lost to Red Sox (59-43), 3-2 | Kingdome (22-34) | 46-62 | |
| » W: Bill Campbell (11-7) L: John Montague (5-9) | Fifth | 19 out |
| Future Mariner Julio Mateo is born in Bani, D.R. |
| Wednesday, August 3 |
| » Lost to Red Sox (60-43), 12-4 | Kingdome (22-35) | 46-63 | Lost 2 |
| » W: Mike Paxton (5-2) L: Gary Wheelock (6-7) | Fifth | 19 out |
| Friday, August 5 |
| » Defeated Yankees (59-48), 5-3 | Kingdome (23-35) | 47-63 | |
| » W: Dick Pole (7-7) L: Ed Figueroa (10-8) S: Enrique Romo (10) | Sixth | 18½ out |
| Saturday, August 6 |
| » Defeated Yankees (59-49), 9-2 | Kingdome (24-35) | 48-63 | Won 2 |
| » W: Glenn Abbott (9-7) L: Catfish Hunter (6-7) | Sixth | 17½ out |
| Sunday, August 7 |
| » Lost to Yankees (60-49), 7-1 | Kingdome (24-36) | 48-64 | |
| » W: Mike Torrez (11-10) L: John Montague (5-10) | Sixth | 17½ out |
| Monday, August 8 |
| » Lost to White Sox (64-44), 5-4 | Comiskey Park I (1-3) | 48-65 | Lost 2 |
| » W: Randy Wiles (1-0) L: Enrique Romo (5-8) | Sixth | 18½ out |
| Tuesday, August 9 |
| » Lost to White Sox (65-44), 13-3 | Comiskey Park I (1-4) | 48-66 | Lost 3 |
| » W: Steve Stone (12-7) L: Gary Wheelock (6-8) | Sixth | 19½ out |
| Wednesday, August 10 |
| » Lost to Orioles (64-47), 5-4 | Memorial Stadium (0-4) | 48-67 | Lost 4 |
| » W: Rudy May (13-10) L: Dick Pole (7-8) S: Dick Drago (5) | Sixth | 19½ out |
| Thursday, August 11 |
| » Lost to Orioles (65-47), 4-3 | Memorial Stadium (0-5) | 48-68 | Lost 5 |
| » W: Dick Drago (5-3) L: Enrique Romo (5-9) | Sixth | 19½ out |
| Friday, August 12 |
| » Lost to Red Sox (66-44), 7-2 | Fenway Park (1-3) | 48-69 | Lost 6 |
| » W: Rick Wise (9-4) L: Paul Mitchell (0-4) | Sixth | 20 out |
| Saturday, August 13 |
| » Lost to Red Sox (67-44), 13-6 | Fenway Park (1-4) | 48-70 | Lost 7 |
| » W: Fergie Jenkins (9-7) L: Bob Galasso (0-2) | Sixth | 20½ out |
| Sunday, August 14 |
| » Lost to Red Sox (68-44), 11-1 | Fenway Park (1-5) | 48-71 | Lost 8 |
| » W: Mike Paxton (6-2) L: Gary Wheelock (6-9) | Sixth | 20½ out |
| Monday, August 15 |
| » Lost to Tigers (54-61), 13-1 | Tiger Stadium (3-1) | 48-72 | Lost 9 |
| » W: Bob Sykes (3-4) L: Dick Pole (7-9) | Sixth | 21 out |
| Tuesday, August 16 |
| » Defeated Tigers (54-62), 3-2 | Tiger Stadium (4-1) | 49-72 | |
| » W: Glenn Abbott (10-7) L: Jack Morris (1-1) | Fifth | 20 out |
| Wednesday, August 17 |
| » Defeated Twins (68-52), 3-2 | Metropolitan Stadium (4-3) | 50-72 | Won 2 |
| » W: Paul Mitchell (1-4) L: Geoff Zahn (11-10) S: Enrique Romo (11) | Sixth | 19½ out |
| Thursday, August 18 |
| » Lost to Twins (69-52), 8-2 | Metropolitan Stadium (4-4) | 50-73 | |
| » W: Paul Thormodsgard (10-9) L: Bob Galasso (0-3) | Sixth | 20½ out |
| Friday, August 19 |
| » Lost to Tigers (55-64), 6-4 | Kingdome (24-37) | 50-74 | Lost 2 |
| » W: Dave Rozema (14-4) L: Dick Pole (7-10) S: Bruce Taylor (1) | Sixth | 20½ out |
| Future Mariner Matt White is born in Pittsfield, MA. |
| Saturday, August 20 |
| » Lost to Tigers (56-64), 7-3 | Kingdome (24-38) | 50-75 | Lost 3 |
| » W: Milt Wilcox (5-0) L: Glenn Abbott (10-8) | Sixth | 21 out |
| Future Mariner Aaron Taylor is born in Valdosta, GA. |
| Sunday, August 21 |
| » Lost to Tigers (57-64), 5-4 | Kingdome (24-39) | 50-76 | Lost 4 |
| » W: Jim Crawford (5-5) L: Paul Mitchell (1-5) S: John Hiller (6) | Sixth | 22 out |
| Monday, August 22 |
| » Lost to Indians (57-66), 12-1 | Kingdome (24-40) | 50-77 | Lost 5 |
| » W: Jim Bibby (10-10) L: Bob Galasso (0-4) | Sixth | 22½ out |
| » Defeated Indians (57-67), 4-3 | Kingdome (25-40) | 51-77 | |
| » W: John Montague (6-10) L: Wayne Garland (10-15) | Sixth | 22½ out |
| Wednesday, August 24 |
| » Lost to Blue Jays (44-79), 7-0 | Kingdome (25-41) | 51-78 | |
| » W: Jerry Garvin (9-13) L: Dick Pole (7-11) | Sixth | 24½ out |
| » Lost to Blue Jays (45-79), 9-3 | Kingdome (25-42) | 51-79 | Lost 2 |
| » W: Jesse Jefferson (8-13) L: Glenn Abbott (10-9) | Sixth | 24½ out |
| » Major-league debuts: Rick Honeycutt (Mariners) |
| Friday, August 26 |
| » Defeated Indians (58-69), 4-2 | Cleveland Stadium (1-2) | 52-79 | |
| » W: Enrique Romo (6-9) L: Jim Kern (6-8) | Sixth | 25 out |
| Saturday, August 27 |
| » Lost to Indians (59-69), 10-0 | Cleveland Stadium (1-3) | 52-80 | |
| » W: Dennis Eckersley (13-10) L: Bob Galasso (0-5) | Sixth | 25 out |
| Sunday, August 28 |
| » Lost to Indians (60-69), 10-6 | Cleveland Stadium (1-4) | 52-81 | Lost 2 |
| » W: Jim Bibby (11-10) L: Glenn Abbott (10-10) | Seventh | 26 out |
| Tuesday, August 30 |
| » Lost to Yankees (79-52), 6-5 | Yankee Stadium (0-4) | 52-82 | Lost 3 |
| » W: Sparky Lyle (11-4) L: Diego Segui (0-5) | Seventh | 25½ out |
| Wednesday, August 31 |
| » Lost to Yankees (80-52), 5-4 | Yankee Stadium (0-5) | 52-83 | Lost 4 |
| » W: Sparky Lyle (12-4) L: Bob Galasso (0-6) | Seventh | 26½ out |
| Friday, September 2 |
| » Defeated Blue Jays (45-85), 4-3 | Exhibition Stadium (1-2) | 53-83 | |
| » W: Glenn Abbott (11-10) L: Dave Lemanczyk (10-13) | Seventh | 27 out |
| Saturday, September 3 |
| » Defeated Blue Jays (45-86), 6-2 | Exhibition Stadium (2-2) | 54-83 | Won 2 |
| » W: John Montague (7-10) L: Jesse Jefferson (8-14) S: Enrique Romo (12) | Seventh | 27 out |
| Sunday, September 4 |
| » Defeated Blue Jays (45-87), 7-2 | Exhibition Stadium (3-2) | 55-83 | Won 3 |
| » W: Paul Mitchell (2-5) L: Jerry Garvin (9-14) | Sixth | 27 out |
| Monday, September 5 |
| » Lost to Royals (81-54), 8-4 | Kingdome (25-43) | 55-84 | |
| » W: Jim Colborn (16-13) L: Dick Pole (7-12) | Seventh | 28 out |
| Tuesday, September 6 |
| » Lost to Royals (82-54), 10-0 | Kingdome (25-44) | 55-85 | Lost 2 |
| » W: Paul Splittorff (13-6) L: Rick Honeycutt (0-1) | Seventh | 29 out |
| Wednesday, September 7 |
| » Lost to Royals (83-54), 10-7 | Kingdome (25-45) | 55-86 | Lost 3 |
| » W: Mark Littell (7-4) L: Enrique Romo (6-10) S: Doug Bird (11) | Seventh | 30 out |
| Thursday, September 8 |
| » Lost to Royals (84-54), 7-2 | Kingdome (25-46) | 55-87 | Lost 4 |
| » W: Dennis Leonard (16-11) L: John Montague (7-11) | Seventh | 31 out |
| Friday, September 9 |
| » Defeated Rangers (75-63), 8-3 | Kingdome (26-46) | 56-87 | |
| » W: Tom House (4-5) L: Gaylord Perry (12-12) | Sixth | 31 out |
| Saturday, September 10 |
| » Lost to Rangers (76-63), 5-2 | Kingdome (26-47) | 56-88 | |
| » W: Doyle Alexander (14-10) L: Paul Mitchell (2-6) | Seventh | 32½ out |
| » Lost to Rangers (77-63), 7-1 | Kingdome (26-48) | 56-89 | Lost 2 |
| » W: Roger Moret (3-2) L: Mike Kekich (5-3) | Seventh | 32½ out |
| Sunday, September 11 |
| » Defeated Rangers (77-64), 6-4 | Kingdome (27-48) | 57-89 | |
| » W: Enrique Romo (7-10) L: Paul Lindblad (4-4) | Seventh | 32½ out |
| Tuesday, September 13 |
| » Lost to Brewers (61-87), 6-5 | Kingdome (27-49) | 57-90 | |
| » W: Gary Beare (3-3) L: Glenn Abbott (11-11) S: Bob McClure (6) | Seventh | 33 out |
| Wednesday, September 14 |
| » Lost to Brewers (62-87), 8-5 | Kingdome (27-50) | 57-91 | Lost 2 |
| » W: Eduardo Rodriguez (4-6) L: Greg Erardi (0-1) | Seventh | 34½ out |
| Friday, September 16 |
| » Defeated Royals (91-55), 4-1 | Royals Stadium (3-2) | 58-91 | |
| » W: Doc Medich (11-6) L: Marty Pattin (8-3) | Seventh | 34½ out |
| Saturday, September 17 |
| » Lost to Royals (92-55), 7-5 | Royals Stadium (3-3) | 58-92 | |
| » W: Larry Gura (7-5) L: Diego Segui (0-6) | Seventh | 35½ out |
| Sunday, September 18 |
| » Lost to Royals (93-55), 8-3 | Royals Stadium (3-4) | 58-93 | Lost 2 |
| » W: Dennis Leonard (18-11) L: Glenn Abbott (11-12) | Seventh | 36½ out |
| » Major-league debuts: Clint Hurdle (Royals) Byron McLaughlin (Mariners) |
| Tuesday, September 20 |
| » Lost to Brewers (64-89), 5-1 | County Stadium (1-3) | 58-94 | Lost 3 |
| » W: Jim Slaton (10-14) L: John Montague (7-12) | Seventh | 37½ out |
| Wednesday, September 21 |
| » Defeated Brewers (64-90), 11-4 | County Stadium (2-3) | 59-94 | |
| » W: Enrique Romo (8-10) L: Jerry Augustine (12-17) | Seventh | 37½ out |
| Thursday, September 22 |
| » Lost to White Sox (86-68), 5-4 | Kingdome (27-51) | 59-95 | |
| » W: Steve Renko (6-2) L: Steve Burke (0-1) S: Lerrin LaGrow (24) | Seventh | 38 out |
| Friday, September 23 |
| » Defeated White Sox (86-69), 3-2 | Kingdome (28-51) | 60-95 | |
| » W: Tom House (5-5) L: Francisco Barrios (14-6) S: John Montague (4) | Seventh | 38 out |