| 1989-04-04 | vs CHA | 1 | L 2-9 | 0-1 | 7 | 33,265 | Mike Witt | Jerry Reuss | Jerry Reuss | Mike Witt | Donn Pall | 2 | 9 | -7 |
| 1989-04-05 | vs CHA | 2 | W 6-2 | 1-1 | 6 | 20,969 | Chuck Finley | Eric King | Chuck Finley | Eric King | Greg Minton | 8 | 11 | -3 |
| 1989-04-06 | vs CHA | 3 | L 2-3 | 1-2 | 6 | 20,667 | Bert Blyleven | Shawn Hillegas | Ken Patterson | Willie Fraser | Donn Pall | 10 | 14 | -4 |
| 1989-04-07 | vs SEA | 4 | W 2-1 | 2-2 | 6 | 22,822 | Kirk McCaskill | Erik Hanson | Kirk McCaskill | Erik Hanson | Bryan Harvey | 12 | 15 | -3 |
| 1989-04-08 | vs SEA | 5 | L 0-7 | 2-3 | 6 | 46,847 | Jim Abbott | Mark Langston | Mark Langston | Jim Abbott | | 12 | 22 | -10 |
| 1989-04-09 | vs SEA | 6 | W 13-5 | 3-3 | 6 | 23,226 | Mike Witt | Steve Trout | Mike Witt | Steve Trout | | 25 | 27 | -2 |
| 1989-04-10 | vs OAK | 7 | L 0-4 | 3-4 | 6 | 23,820 | Chuck Finley | Bob Welch | Bob Welch | Chuck Finley | | 25 | 31 | -6 |
| 1989-04-11 | vs OAK | 8 | W 7-1 | 4-4 | 6 | 23,322 | Bert Blyleven | Storm Davis | Bert Blyleven | Storm Davis | | 32 | 32 | 0 |
| 1989-04-12 | vs OAK | 9 | W 5-0 | 5-4 | 6 | 24,650 | Kirk McCaskill | Curt Young | Kirk McCaskill | Curt Young | | 37 | 32 | 5 |
| 1989-04-13 | vs OAK | 10 | L 0-5 | 5-5 | 6 | 24,137 | Jim Abbott | Mike Moore | Mike Moore | Jim Abbott | | 37 | 37 | 0 |
| 1989-04-14 | @ SEA | 11 | L 5-9 | 5-6 | 6 | 14,590 | Mike Witt | Mark Langston | Mark Langston | Mike Witt | | 42 | 46 | -4 |
| 1989-04-15 | @ SEA | 12 | W 9-2 | 6-6 | 6 | 29,819 | Chuck Finley | Scott Bankhead | Chuck Finley | Jerry Reed | | 51 | 48 | 3 |
| 1989-04-16 | @ SEA | 13 | W 10-0 | 7-6 | 5 | 10,621 | Bert Blyleven | Mike Campbell | Bert Blyleven | Mike Campbell | | 61 | 48 | 13 |
| 1989-04-17 | @ CHA | 14 | W 3-0 | 8-6 | 5 | 6,392 | Kirk McCaskill | Shawn Hillegas | Kirk McCaskill | Shawn Hillegas | Bryan Harvey | 64 | 48 | 16 |
| 1989-04-19 | @ CHA | 15 | W 7-2 | 9-6 | 3 | 6,897 | Mike Witt | Bill Long | Mike Witt | Bill Long | Greg Minton | 71 | 50 | 21 |
| 1989-04-21 | @ OAK | 16 | L 6-10 | 9-7 | 5 | 26,903 | Chuck Finley | Bob Welch | Bob Welch | Chuck Finley | Rick Honeycutt | 77 | 60 | 17 |
| 1989-04-22 | @ OAK | 17 | L 3-4 | 9-8 | 5 | 33,172 | Bert Blyleven | Curt Young | Curt Young | Bert Blyleven | Dennis Eckersley | 80 | 64 | 16 |
| 1989-04-23 | @ OAK | 18 | L 0-2 | 9-9 | 5 | 25,681 | Kirk McCaskill | Mike Moore | Mike Moore | Kirk McCaskill | Dennis Eckersley | 80 | 66 | 14 |
| 1989-04-24 | vs BAL | 19 | W 3-2 | 10-9 | 5 | 22,213 | Jim Abbott | Dave J. Schmidt | Jim Abbott | Dave J. Schmidt | Bryan Harvey | 83 | 68 | 15 |
| 1989-04-25 | vs BAL | 20 | L 1-8 | 10-10 | 5 | 21,165 | Mike Witt | Jeff Ballard | Jeff Ballard | Mike Witt | | 84 | 76 | 8 |
| 1989-04-26 | vs DET | 21 | W 1-0 | 11-10 | 4 | 23,334 | Chuck Finley | Jack Morris | Chuck Finley | Jack Morris | Bryan Harvey | 85 | 76 | 9 |
| 1989-04-27 | vs DET | 22 | W 10-3 | 12-10 | 4 | 25,895 | Bert Blyleven | Charles Hudson | Bert Blyleven | Charles Hudson | | 95 | 79 | 16 |
| 1989-04-28 | vs TOR | 23 | W 9-0 | 13-10 | 4 | 30,958 | Kirk McCaskill | Todd Stottlemyre | Kirk McCaskill | Todd Stottlemyre | | 104 | 79 | 25 |
| 1989-04-29 | vs TOR | 24 | W 4-3 | 14-10 | 4 | 49,906 | Jim Abbott | Jimmy Key | Greg Minton | Duane Ward | | 108 | 82 | 26 |
| 1989-04-30 | vs TOR | 25 | W 1-0 | 15-10 | 4 | 31,125 | Mike Witt | John Cerutti | Bob McClure | Tom Henke | | 109 | 82 | 27 |
| 1989-05-02 | @ BAL | 26 | L 3-4 | 15-11 | 4 | 17,668 | Chuck Finley | Jose Bautista | Gregg Olson | Willie Fraser | | 112 | 86 | 26 |
| 1989-05-03 | @ BAL | 27 | W 2-0 | 16-11 | 4 | 19,564 | Bert Blyleven | Bob Milacki | Rich Monteleone | Bob Milacki | | 114 | 86 | 28 |
| 1989-05-04 | @ TOR | 28 | W 3-2 | 17-11 | 4 | 21,188 | Kirk McCaskill | Jimmy Key | Bryan Harvey | Duane Ward | Greg Minton | 117 | 88 | 29 |
| 1989-05-05 | @ TOR | 29 | W 5-3 | 18-11 | 4 | 24,188 | Jim Abbott | John Cerutti | Jim Abbott | John Cerutti | Bryan Harvey | 122 | 91 | 31 |
| 1989-05-06 | @ TOR | 30 | W 5-4 | 19-11 | 3 | 39,123 | Mike Witt | Al Leiter | Bob McClure | Duane Ward | | 127 | 95 | 32 |
| 1989-05-08 | @ DET | 31 | W 9-2 | 20-11 | 2 | 12,759 | Chuck Finley | Doyle Alexander | Chuck Finley | Doyle Alexander | | 136 | 97 | 39 |
| 1989-05-09 | @ DET | 32 | W 5-1 | 21-11 | 2 | 12,290 | Bert Blyleven | Paul Gibson | Bert Blyleven | Paul Gibson | | 141 | 98 | 43 |
| 1989-05-10 | @ DET | 33 | L 2-3 | 21-12 | 2 | 13,187 | Kirk McCaskill | Frank Tanana | Guillermo Hernandez | Bryan Harvey | | 143 | 101 | 42 |
| 1989-05-12 | vs NYA | 34 | L 2-5 | 21-13 | 3 | 41,846 | Jim Abbott | Richard Dotson | Richard Dotson | Jim Abbott | Lee Guetterman | 145 | 106 | 39 |
| 1989-05-13 | vs NYA | 35 | W 6-1 | 22-13 | 3 | 33,528 | Mike Witt | Tommy John | Mike Witt | Tommy John | | 151 | 107 | 44 |
| 1989-05-14 | vs NYA | 36 | W 5-0 | 23-13 | 3 | 36,690 | Chuck Finley | Andy Hawkins | Chuck Finley | Andy Hawkins | Greg Minton | 156 | 107 | 49 |
| 1989-05-15 | vs NYA | 37 | W 4-3 | 24-13 | 3 | 25,959 | Bert Blyleven | Dave LaPoint | Willie Fraser | Lance McCullers | | 160 | 110 | 50 |
| 1989-05-16 | vs BOS | 38 | W 7-2 | 25-13 | 3 | 26,043 | Kirk McCaskill | Mike Smithson | Kirk McCaskill | Mike Smithson | | 167 | 112 | 55 |
| 1989-05-17 | vs BOS | 39 | W 5-0 | 26-13 | 2 | 31,230 | Jim Abbott | Roger Clemens | Jim Abbott | Roger Clemens | | 172 | 112 | 60 |
| 1989-05-18 | vs BOS | 40 | L 2-5 | 26-14 | 2 | 28,114 | Mike Witt | John Dopson | John Dopson | Mike Witt | Rob Murphy | 174 | 117 | 57 |
| 1989-05-19 | vs MIL | 41 | W 3-1 | 27-14 | 2 | 39,978 | Chuck Finley | Bryan Clutterbuck | Chuck Finley | Bryan Clutterbuck | | 177 | 118 | 59 |
| 1989-05-20 | vs MIL | 42 | L 3-5 | 27-15 | 2 | 34,764 | Bert Blyleven | Don August | Don August | Bert Blyleven | Dan Plesac | 180 | 123 | 57 |
| 1989-05-21 | vs MIL | 43 | W 12-9 | 28-15 | 2 | 35,122 | Kirk McCaskill | Bill Wegman | Dan Petry | Bill Wegman | | 192 | 132 | 60 |
| 1989-05-24 | @ NYA | 44 | W 11-4 | 29-15 | 2 | 19,144 | Jim Abbott | Richard Dotson | Jim Abbott | Richard Dotson | Greg Minton | 203 | 136 | 67 |
| 1989-05-25 | @ NYA | 45 | L 6-8 | 29-16 | 2 | 23,354 | Mike Witt | Tommy John | Dale Mohorcic | Willie Fraser | Dave Righetti | 209 | 144 | 65 |
| 1989-05-26 | @ BOS | 46 | W 5-0 | 30-16 | 2 | 32,417 | Chuck Finley | Roger Clemens | Chuck Finley | Roger Clemens | | 214 | 144 | 70 |
| 1989-05-28 | @ BOS | 47 | W 3-0 | 31-16 | 2 | 34,311 | Kirk McCaskill | John Dopson | Kirk McCaskill | John Dopson | | 217 | 144 | 73 |
| 1989-05-29 | @ MIL | 48 | W 12-3 | 32-16 | 1 | 15,762 | Bert Blyleven | Mike Birkbeck | Bert Blyleven | Mike Birkbeck | | 229 | 147 | 82 |
| 1989-05-30 | @ MIL | 49 | W 3-2 | 33-16 | 1 | 8,012 | Jim Abbott | Bryan Clutterbuck | Jim Abbott | Bryan Clutterbuck | Bob McClure | 232 | 149 | 83 |
| 1989-05-31 | @ MIL | 50 | L 1-4 | 33-17 | 1 | 14,129 | Mike Witt | Don August | Don August | Mike Witt | Dan Plesac | 233 | 153 | 80 |
| 1989-06-02 | vs KCA | 51 | L 0-4 | 33-18 | 1 | 32,493 | Chuck Finley | Mark Gubicza | Mark Gubicza | Chuck Finley | | 233 | 157 | 76 |
| 1989-06-03 | vs KCA | 52 | W 4-3 | 34-18 | 1 | 50,640 | Kirk McCaskill | Charlie Leibrandt | Kirk McCaskill | Charlie Leibrandt | Bob McClure | 237 | 160 | 77 |
| 1989-06-04 | vs KCA | 53 | W 5-1 | 35-18 | 1 | 47,880 | Bert Blyleven | Kevin Appier | Bert Blyleven | Kevin Appier | | 242 | 161 | 81 |
| 1989-06-05 | vs CLE | 54 | L 3-7 | 35-19 | 1 | 24,188 | Mike Witt | Buddy Black | Buddy Black | Mike Witt | | 245 | 168 | 77 |
| 1989-06-06 | vs CLE | 55 | W 2-1 | 36-19 | 1 | 22,586 | Dan Petry | Rich Yett | Dan Petry | Rich Yett | Bryan Harvey | 247 | 169 | 78 |
| 1989-06-07 | vs CLE | 56 | L 0-1 | 36-20 | 2 | 26,536 | Chuck Finley | Greg Swindell | Greg Swindell | Chuck Finley | | 247 | 170 | 77 |
| 1989-06-09 | @ KCA | 57 | L 1-6 | 36-21 | 2 | 34,124 | Kirk McCaskill | Charlie Leibrandt | Charlie Leibrandt | Kirk McCaskill | | 248 | 176 | 72 |
| 1989-06-10 | @ KCA | 58 | L 4-5 | 36-22 | 2 | 36,949 | Bert Blyleven | Bret Saberhagen | Tom Gordon | Greg Minton | Steve Farr | 252 | 181 | 71 |
| 1989-06-11 | @ KCA | 59 | L 3-5 | 36-23 | 2 | 30,942 | Jim Abbott | Floyd Bannister | Terry Leach | Jim Abbott | Steve Farr | 255 | 186 | 69 |
| 1989-06-12 | @ TEX | 60 | L 0-4 | 36-24 | 3 | 18,960 | Mike Witt | Mike Jeffcoat | Mike Jeffcoat | Mike Witt | | 255 | 190 | 65 |
| 1989-06-14 | @ TEX | 61 | L 1-5 | 36-26 | 3 | 0 | Chuck Finley | Nolan Ryan | Nolan Ryan | Chuck Finley | Jeff Russell | 256 | 195 | 61 |
| 1989-06-14 | @ TEX | 62 | L 3-6 | 36-26 | 3 | 40,159 | Kirk McCaskill | Charlie Hough | Charlie Hough | Kirk McCaskill | Jeff Russell | 259 | 201 | 58 |
| 1989-06-16 | @ DET | 63 | W 9-4 | 37-26 | 3 | 26,140 | Bert Blyleven | Mike Schwabe | Bert Blyleven | Mike Schwabe | Bryan Harvey | 268 | 205 | 63 |
| 1989-06-17 | @ DET | 64 | W 6-3 | 38-26 | 2 | 39,961 | Jim Abbott | Doyle Alexander | Jim Abbott | Doyle Alexander | Bob McClure | 274 | 208 | 66 |
| 1989-06-18 | @ DET | 65 | W 3-1 | 39-26 | 2 | 25,928 | Mike Witt | David Palmer | Mike Witt | David Palmer | Bryan Harvey | 277 | 209 | 68 |
| 1989-06-19 | vs TOR | 66 | L 1-8 | 39-27 | 2 | 24,430 | Chuck Finley | Dave Stieb | Dave Stieb | Chuck Finley | | 278 | 217 | 61 |
| 1989-06-20 | vs TOR | 67 | L 2-6 | 39-28 | 3 | 23,956 | Kirk McCaskill | Jimmy Key | Jimmy Key | Kirk McCaskill | | 280 | 223 | 57 |
| 1989-06-21 | vs TOR | 68 | L 1-6 | 39-29 | 3 | 24,259 | Bert Blyleven | Mike Flanagan | Tom Henke | Greg Minton | | 281 | 229 | 52 |
| 1989-06-22 | vs BAL | 69 | L 5-6 | 39-30 | 3 | 23,876 | Jim Abbott | Brian Holton | Mark Williamson | Willie Fraser | Gregg Olson | 286 | 235 | 51 |
| 1989-06-23 | vs BAL | 70 | W 5-1 | 40-30 | 3 | 45,452 | Mike Witt | Dave J. Schmidt | Mike Witt | Dave J. Schmidt | | 291 | 236 | 55 |
| 1989-06-24 | vs BAL | 71 | W 8-3 | 41-30 | 3 | 45,824 | Chuck Finley | Bob Milacki | Chuck Finley | Bob Milacki | | 299 | 239 | 60 |
| 1989-06-25 | vs BAL | 72 | W 7-6 | 42-30 | 2 | 37,528 | Kirk McCaskill | Jeff Ballard | Kirk McCaskill | Jeff Ballard | Bryan Harvey | 306 | 245 | 61 |
| 1989-06-27 | @ CLE | 73 | W 2-1 | 43-30 | 2 | 17,281 | Bert Blyleven | Buddy Black | Rich Monteleone | Neil Allen | Bryan Harvey | 308 | 246 | 62 |
| 1989-06-28 | @ CLE | 74 | L 1-2 | 43-31 | 2 | 11,211 | Jim Abbott | Scott Bailes | Scott Bailes | Jim Abbott | Doug Jones | 309 | 248 | 61 |
| 1989-06-29 | @ MIN | 75 | W 10-3 | 44-31 | 2 | 22,422 | Mike Witt | Mike Dyer | Mike Witt | Mike Dyer | | 319 | 251 | 68 |
| 1989-06-30 | @ MIN | 76 | W 7-2 | 45-31 | 2 | 35,500 | Chuck Finley | Allan Anderson | Chuck Finley | Allan Anderson | | 326 | 253 | 73 |
| 1989-07-01 | @ MIN | 77 | W 6-1 | 46-31 | 2 | 28,682 | Kirk McCaskill | Shane Rawley | Kirk McCaskill | Shane Rawley | | 332 | 254 | 78 |
| 1989-07-02 | @ MIN | 78 | L 1-2 | 46-32 | 2 | 49,098 | Bert Blyleven | Frank Viola | Frank Viola | Rich Monteleone | | 333 | 256 | 77 |
| 1989-07-03 | vs TEX | 79 | W 5-2 | 47-32 | 2 | 29,614 | Jim Abbott | Mike Jeffcoat | Jim Abbott | Mike Jeffcoat | Bryan Harvey | 338 | 258 | 80 |
| 1989-07-04 | vs TEX | 80 | W 5-2 | 48-32 | 2 | 62,390 | Mike Witt | Kevin Brown | Willie Fraser | Kevin Brown | | 343 | 260 | 83 |
| 1989-07-05 | vs TEX | 81 | W 2-1 | 49-32 | 1 | 24,852 | Chuck Finley | Charlie Hough | Chuck Finley | Charlie Hough | | 345 | 261 | 84 |
| 1989-07-06 | vs TEX | 82 | L 0-3 | 49-33 | 2 | 37,867 | Kirk McCaskill | Nolan Ryan | Nolan Ryan | Kirk McCaskill | | 345 | 264 | 81 |
| 1989-07-07 | vs MIN | 83 | W 5-2 | 50-33 | 1 | 30,299 | Bert Blyleven | Frank Viola | Bert Blyleven | Frank Viola | | 350 | 266 | 84 |
| 1989-07-08 | vs MIN | 84 | W 4-1 | 51-33 | 1 | 29,797 | Jim Abbott | Roy Smith | Jim Abbott | Roy Smith | Bryan Harvey | 354 | 267 | 87 |
| 1989-07-09 | vs MIN | 85 | W 9-3 | 52-33 | 1 | 36,696 | Mike Witt | Allan Anderson | Mike Witt | Allan Anderson | | 363 | 270 | 93 |
| 1989-07-13 | @ BAL | 86 | W 13-5 | 53-33 | 1 | 29,750 | Bert Blyleven | Jeff Ballard | Bert Blyleven | Mark Thurmond | | 376 | 275 | 101 |
| 1989-07-14 | @ BAL | 87 | L 4-6 | 53-34 | 1 | 45,921 | Kirk McCaskill | Brian Holton | Brian Holton | Kirk McCaskill | Gregg Olson | 380 | 281 | 99 |
| 1989-07-15 | @ BAL | 88 | L 9-11 | 53-35 | 1 | 47,393 | Chuck Finley | Dave J. Schmidt | Mark Williamson | Bryan Harvey | | 389 | 292 | 97 |
| 1989-07-16 | @ BAL | 89 | L 2-3 | 53-36 | 1 | 40,526 | Mike Witt | Bob Milacki | Mike Smith | Willie Fraser | | 391 | 295 | 96 |
| 1989-07-17 | @ TOR | 90 | L 4-6 | 53-38 | 1 | 0 | Jim Abbott | Todd Stottlemyre | David Wells | Jim Abbott | Tom Henke | 395 | 301 | 94 |
| 1989-07-17 | @ TOR | 91 | L 4-5 | 53-38 | 1 | 48,641 | Dan Petry | Steve Cummings | David Wells | Bob McClure | Tom Henke | 399 | 306 | 93 |
| 1989-07-18 | @ TOR | 92 | W 1-0 | 54-38 | 1 | 48,717 | Bert Blyleven | Jimmy Key | Bert Blyleven | Jimmy Key | | 400 | 306 | 94 |
| 1989-07-20 | vs DET | 93 | W 4-3 | 55-38 | 1 | 26,854 | Chuck Finley | Doyle Alexander | Chuck Finley | Mike Henneman | | 404 | 309 | 95 |
| 1989-07-21 | vs DET | 94 | W 8-7 | 56-38 | 1 | 34,924 | Mike Witt | Frank Tanana | Bryan Harvey | Dave Beard | | 412 | 316 | 96 |
| 1989-07-22 | vs DET | 95 | W 5-4 | 57-38 | 1 | 48,766 | Jim Abbott | Paul Gibson | Dan Petry | Charles Hudson | | 417 | 320 | 97 |
| 1989-07-23 | vs DET | 96 | W 5-4 | 58-38 | 1 | 29,444 | Bert Blyleven | Kevin Ritz | Bob McClure | Mike Henneman | | 422 | 324 | 98 |
| 1989-07-24 | @ OAK | 97 | W 5-4 | 59-38 | 1 | 44,548 | Kirk McCaskill | Curt Young | Willie Fraser | Gene Nelson | Bryan Harvey | 427 | 328 | 99 |
| 1989-07-25 | @ OAK | 98 | W 4-0 | 60-38 | 1 | 43,529 | Chuck Finley | Dave Stewart | Chuck Finley | Dave Stewart | Greg Minton | 431 | 328 | 103 |
| 1989-07-26 | @ OAK | 99 | L 5-9 | 60-39 | 1 | 44,588 | Mike Witt | Mike Moore | Matt Young | Mike Witt | | 436 | 337 | 99 |
| 1989-07-27 | vs CHA | 100 | W 8-5 | 61-39 | 1 | 31,892 | Jim Abbott | Melido Perez | Jim Abbott | Melido Perez | Bryan Harvey | 444 | 342 | 102 |
| 1989-07-28 | vs CHA | 101 | W 6-5 | 62-39 | 1 | 32,620 | Bert Blyleven | Richard Dotson | Bryan Harvey | Donn Pall | | 450 | 347 | 103 |
| 1989-07-29 | vs CHA | 102 | W 2-1 | 63-39 | 1 | 34,940 | Kirk McCaskill | Steve Rosenberg | Kirk McCaskill | Steve Rosenberg | Bryan Harvey | 452 | 348 | 104 |
| 1989-07-30 | vs CHA | 103 | L 2-3 | 63-40 | 1 | 29,363 | Chuck Finley | Jerry Reuss | Jerry Reuss | Chuck Finley | Bobby Thigpen | 454 | 351 | 103 |
| 1989-07-31 | @ SEA | 104 | L 5-6 | 63-41 | 1 | 19,494 | Mike Witt | Scott Bankhead | Keith Comstock | Bryan Harvey | Mike Schooler | 459 | 357 | 102 |
| 1989-08-01 | @ SEA | 105 | L 1-8 | 63-42 | 2 | 16,533 | Jim Abbott | Mike Dunne | Mike Dunne | Jim Abbott | | 460 | 365 | 95 |
| 1989-08-02 | @ SEA | 106 | W 7-0 | 64-42 | 2 | 11,460 | Bert Blyleven | Jerry Reed | Bert Blyleven | Jerry Reed | | 467 | 365 | 102 |
| 1989-08-03 | @ SEA | 107 | W 6-0 | 65-42 | 1 | 12,584 | Kirk McCaskill | Randy Johnson | Kirk McCaskill | Randy Johnson | | 473 | 365 | 108 |
| 1989-08-04 | @ MIL | 108 | W 6-2 | 66-42 | 1 | 27,596 | Chuck Finley | Jerry Reuss | Chuck Finley | Jerry Reuss | Willie Fraser | 479 | 367 | 112 |
| 1989-08-05 | @ MIL | 109 | L 2-5 | 66-43 | 1 | 42,324 | Mike Witt | Teddy Higuera | Teddy Higuera | Mike Witt | | 481 | 372 | 109 |
| 1989-08-06 | @ MIL | 110 | W 6-0 | 67-43 | 1 | 31,455 | Jim Abbott | Jaime Navarro | Jim Abbott | Jaime Navarro | | 487 | 372 | 115 |
| 1989-08-08 | vs SEA | 111 | L 4-6 | 67-44 | 1 | 27,252 | Bert Blyleven | Randy Johnson | Jerry Reed | Greg Minton | Mike Schooler | 491 | 378 | 113 |
| 1989-08-09 | vs SEA | 112 | W 4-1 | 68-44 | 1 | 26,416 | Kirk McCaskill | Brian Holman | Kirk McCaskill | Brian Holman | Bryan Harvey | 495 | 379 | 116 |
| 1989-08-10 | vs SEA | 113 | L 2-3 | 68-45 | 1 | 26,924 | Chuck Finley | Scott Bankhead | Michael Jackson | Chuck Finley | Mike Schooler | 497 | 382 | 115 |
| 1989-08-11 | vs OAK | 114 | L 0-5 | 68-46 | 2 | 61,696 | Mike Witt | Mike Moore | Mike Moore | Mike Witt | | 497 | 387 | 110 |
| 1989-08-12 | vs OAK | 115 | L 3-8 | 68-47 | 2 | 53,036 | Jim Abbott | Bob Welch | Bob Welch | Jim Abbott | Todd Burns | 500 | 395 | 105 |
| 1989-08-13 | vs OAK | 116 | W 4-3 | 69-47 | 2 | 60,326 | Bert Blyleven | Dave Stewart | Bert Blyleven | Dave Stewart | Bryan Harvey | 504 | 398 | 106 |
| 1989-08-14 | vs MIN | 117 | L 3-6 | 69-48 | 2 | 26,542 | Kirk McCaskill | Allan Anderson | Allan Anderson | Kirk McCaskill | Jeff Reardon | 507 | 404 | 103 |
| 1989-08-15 | vs MIN | 118 | W 3-2 | 70-48 | 2 | 32,050 | Chuck Finley | Mike Dyer | Chuck Finley | Mike Dyer | Bryan Harvey | 510 | 406 | 104 |
| 1989-08-16 | vs MIN | 119 | W 7-3 | 71-48 | 2 | 32,993 | Mike Witt | Shane Rawley | Mike Witt | Shane Rawley | | 517 | 409 | 108 |
| 1989-08-18 | vs CLE | 120 | W 6-5 | 72-48 | 1 | 52,286 | Jim Abbott | Tom Candiotti | Greg Minton | Steve Olin | Bryan Harvey | 523 | 414 | 109 |
| 1989-08-19 | vs CLE | 121 | W 7-4 | 73-48 | 1 | 40,574 | Bert Blyleven | Rod Nichols | Bert Blyleven | Rod Nichols | Greg Minton | 530 | 418 | 112 |
| 1989-08-20 | vs CLE | 122 | W 1-0 | 74-48 | 1 | 32,640 | Kirk McCaskill | Buddy Black | Kirk McCaskill | Buddy Black | | 531 | 418 | 113 |
| 1989-08-21 | @ KCA | 123 | L 2-4 | 74-49 | 2 | 37,170 | Chuck Finley | Bret Saberhagen | Bret Saberhagen | Willie Fraser | Rick Luecken | 533 | 422 | 111 |
| 1989-08-22 | @ KCA | 124 | L 2-4 | 74-50 | 2 | 27,836 | Mike Witt | Mark Gubicza | Terry Leach | Mike Witt | Jeff Montgomery | 535 | 426 | 109 |
| 1989-08-23 | @ KCA | 125 | L 4-6 | 74-51 | 2 | 32,843 | Jim Abbott | Tom Gordon | Tom Gordon | Jim Abbott | Jeff Montgomery | 539 | 432 | 107 |
| 1989-08-24 | @ KCA | 126 | W 5-0 | 75-51 | 2 | 37,656 | Bert Blyleven | Luis Aquino | Bert Blyleven | Luis Aquino | | 544 | 432 | 112 |
| 1989-08-25 | @ TEX | 127 | W 4-1 | 76-51 | 2 | 25,427 | Kirk McCaskill | Bobby Witt | Kirk McCaskill | Bobby Witt | Greg Minton | 548 | 433 | 115 |
| 1989-08-26 | @ TEX | 128 | L 2-3 | 76-52 | 2 | 32,157 | Terry Clark | Charlie Hough | Charlie Hough | Terry Clark | Jeff Russell | 550 | 436 | 114 |
| 1989-08-27 | @ TEX | 129 | W 5-4 | 77-52 | 2 | 25,270 | Mike Witt | Nolan Ryan | Bob McClure | Nolan Ryan | | 555 | 440 | 115 |
| 1989-08-29 | @ BOS | 130 | L 4-8 | 77-54 | 2 | 0 | Bert Blyleven | Mike Smithson | Dennis Lamp | Bert Blyleven | | 559 | 448 | 111 |
| 1989-08-29 | @ BOS | 131 | L 5-13 | 77-54 | 2 | 33,987 | Dan Petry | Eric Hetzel | Bob Stanley | Dan Petry | | 564 | 461 | 103 |
| 1989-08-30 | @ BOS | 132 | W 4-0 | 78-54 | 2 | 34,182 | Jim Abbott | John Dopson | Jim Abbott | John Dopson | | 568 | 461 | 107 |
| 1989-08-31 | @ BOS | 133 | L 2-5 | 78-55 | 3 | 31,737 | Kirk McCaskill | Roger Clemens | Roger Clemens | Kirk McCaskill | | 570 | 466 | 104 |
| 1989-09-01 | @ NYA | 134 | L 5-11 | 78-56 | 3 | 23,421 | Terry Clark | Walt Terrell | Walt Terrell | Terry Clark | Lee Guetterman | 575 | 477 | 98 |
| 1989-09-02 | @ NYA | 135 | L 1-2 | 78-57 | 3 | 23,508 | Mike Witt | Greg Cadaret | Greg Cadaret | Mike Witt | | 576 | 479 | 97 |
| 1989-09-03 | @ NYA | 136 | L 2-5 | 78-58 | 3 | 40,170 | Bert Blyleven | Andy Hawkins | Andy Hawkins | Bert Blyleven | Lance McCullers | 578 | 484 | 94 |
| 1989-09-04 | @ NYA | 137 | L 1-2 | 78-59 | 3 | 23,191 | Jim Abbott | Clay Parker | Clay Parker | Jim Abbott | Dave Righetti | 579 | 486 | 93 |
| 1989-09-05 | vs MIL | 138 | W 8-4 | 79-59 | 3 | 22,951 | Kirk McCaskill | Mark Knudson | Kirk McCaskill | Mark Knudson | Willie Fraser | 587 | 490 | 97 |
| 1989-09-06 | vs MIL | 139 | L 4-7 | 79-60 | 3 | 22,459 | Dan Petry | Chris Bosio | Chris Bosio | Dan Petry | Dan Plesac | 591 | 497 | 94 |
| 1989-09-07 | vs MIL | 140 | L 1-7 | 79-61 | 3 | 24,012 | Mike Witt | Tom Filer | Tom Filer | Mike Witt | | 592 | 504 | 88 |
| 1989-09-08 | vs BOS | 141 | W 2-1 | 80-61 | 3 | 32,408 | Bert Blyleven | Mike Boddicker | Bert Blyleven | Mike Boddicker | Bryan Harvey | 594 | 505 | 89 |
| 1989-09-09 | vs BOS | 142 | W 8-5 | 81-61 | 3 | 42,033 | Jim Abbott | Oil Can Boyd | Willie Fraser | Rob Murphy | Bryan Harvey | 602 | 510 | 92 |
| 1989-09-10 | vs BOS | 143 | W 2-1 | 82-61 | 3 | 37,980 | Kirk McCaskill | Roger Clemens | Bob McClure | Dennis Lamp | | 604 | 511 | 93 |
| 1989-09-12 | vs NYA | 144 | W 7-6 | 83-61 | 3 | 28,260 | Mike Witt | Walt Terrell | Bob McClure | Chuck Cary | | 611 | 517 | 94 |
| 1989-09-13 | vs NYA | 145 | W 4-3 | 84-61 | 3 | 30,670 | Bert Blyleven | Greg Cadaret | Greg Minton | Dave Righetti | | 615 | 520 | 95 |
| 1989-09-15 | @ CHA | 146 | L 1-3 | 85-62 | 3 | 0 | Jim Abbott | Melido Perez | Melido Perez | Jim Abbott | | 616 | 523 | 93 |
| 1989-09-15 | @ CHA | 147 | W 2-1 | 85-62 | 3 | 11,202 | Chuck Finley | Richard Dotson | Chuck Finley | Richard Dotson | Bryan Harvey | 618 | 524 | 94 |
| 1989-09-16 | @ CHA | 148 | L 1-2 | 85-63 | 3 | 11,935 | Kirk McCaskill | Shawn Hillegas | Shawn Hillegas | Kirk McCaskill | Bobby Thigpen | 619 | 526 | 93 |
| 1989-09-17 | @ CHA | 149 | W 6-3 | 86-63 | 3 | 16,215 | Mike Witt | Eric King | Mike Witt | Eric King | Bryan Harvey | 625 | 529 | 96 |
| 1989-09-18 | @ MIN | 150 | W 6-3 | 87-63 | 2 | 12,984 | Bert Blyleven | David West | Bert Blyleven | David West | | 631 | 532 | 99 |
| 1989-09-19 | @ MIN | 151 | W 7-3 | 88-63 | 2 | 13,757 | Chuck Finley | Kevin Tapani | Chuck Finley | Kevin Tapani | Bryan Harvey | 638 | 535 | 103 |
| 1989-09-20 | @ MIN | 152 | W 9-1 | 89-63 | 2 | 15,694 | Jim Abbott | Mark Guthrie | Jim Abbott | Mark Guthrie | | 647 | 536 | 111 |
| 1989-09-21 | @ CLE | 153 | L 4-5 | 89-64 | 2 | 4,735 | Kirk McCaskill | John Farrell | Scott Bailes | Rich Monteleone | | 651 | 541 | 110 |
| 1989-09-23 | @ CLE | 154 | L 3-4 | 89-66 | 2 | 0 | Mike Witt | Buddy Black | Buddy Black | Mike Witt | Doug Jones | 654 | 545 | 109 |
| 1989-09-23 | @ CLE | 155 | L 2-6 | 89-66 | 2 | 8,453 | Bert Blyleven | Tom Candiotti | Tom Candiotti | Bert Blyleven | | 656 | 551 | 105 |
| 1989-09-24 | @ CLE | 156 | L 4-5 | 89-67 | 3 | 14,841 | Chuck Finley | Rod Nichols | Jesse Orosco | Willie Fraser | | 660 | 556 | 104 |
| 1989-09-26 | vs KCA | 157 | L 0-4 | 89-68 | 3 | 26,578 | Kirk McCaskill | Bret Saberhagen | Bret Saberhagen | Kirk McCaskill | | 660 | 560 | 100 |
| 1989-09-27 | vs KCA | 158 | L 3-8 | 89-69 | 3 | 26,894 | Jim Abbott | Tom Gordon | Tom Gordon | Jim Abbott | | 663 | 568 | 95 |
| 1989-09-28 | vs KCA | 159 | W 2-0 | 90-69 | 3 | 25,925 | Bert Blyleven | Larry McWilliams | Bert Blyleven | Larry McWilliams | | 665 | 568 | 97 |
| 1989-09-29 | vs TEX | 160 | L 0-5 | 90-70 | 3 | 27,598 | Mike Witt | Bobby Witt | Bobby Witt | Mike Witt | | 665 | 573 | 92 |
| 1989-09-30 | vs TEX | 161 | L 0-2 | 90-71 | 3 | 34,910 | Chuck Finley | Nolan Ryan | Nolan Ryan | Chuck Finley | | 665 | 575 | 90 |
| 1989-10-01 | vs TEX | 162 | W 4-3 | 91-71 | 3 | 37,259 | Kirk McCaskill | Mike Jeffcoat | Greg Minton | Darrel Akerfelds | Bryan Harvey | 669 | 578 | 91 |