| East | W | L | Pct | GB |
| Pittsburgh | 98 | 64 | .605 | -- |
| St. Louis | 84 | 78 | .519 | 14.0 |
| Philadelphia | 78 | 84 | .481 | 20.0 |
| Chi Cubs | 77 | 83 | .481 | 20.0 |
| NY Mets | 77 | 84 | .478 | 20.5 |
| Montreal | 71 | 90 | .441 | 26.5 |
| Pitcher | Game | Season | Result | Decision | IP | H | R | ER | HR | BB | SO | WP | BK | HB | TBF | Pitches | Str | Bal | Str% | Career G | Career W-L | Feat Description | |
| Dennis Martinez | 1991-04-30 | 1991 | W 1-0 vs LAN | W | SHO | 9 | 4 | 0 | 0 | 0 | 1 | 7 | 0 | 0 | 0 | 33 | 111 | 72 | 39 | 65% | 465 | 166-136 | Complete game/Shutout |
| Tim Burke | 1991-05-04 | 1991 | L 6-5 vs SDN | 1.2 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 4 | 12 | 9 | 3 | 75% | 400 | 42-23 | 400th career game | ||
| Jeff Fassero | 1991-05-04 | 1991 | L 6-5 vs SDN | L | 2 | 2 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | 7 | 23 | 14 | 9 | 61% | 1 | 0-1 | 1st career game | |
| Scott Ruskin | 1991-05-05 | 1991 | L 6-3 vs SDN | 3 | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 10 | 33 | 26 | 7 | 79% | 75 | 3-2 | Threw 79% strikes | ||
| Dennis Martinez | 1991-05-06 | 1991 | W 10-4 vs SFN | W | 7 | 12 | 4 | 4 | 2 | 0 | 4 | 0 | 0 | 0 | 33 | 101 | 76 | 25 | 75% | 466 | 167-136 | Threw 75% strikes | |
| Tim Burke | 1991-05-18 | 1991 | W 3-1 @ SFN | Sv | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 7 | 26 | 19 | 7 | 73% | 405 | 43-23 | 100th career save | |
| Dennis Martinez | 1991-05-21 | 1991 | W 3-0 vs PHI | W | SHO | 9 | 5 | 0 | 0 | 0 | 3 | 3 | 0 | 0 | 0 | 32 | 101 | 66 | 35 | 65% | 469 | 169-137 | Complete game/Shutout |
| Bill Sampen | 1991-05-25 | 1991 | L 6-1 @ CHN | 1.2 | 2 | 1 | 1 | 1 | 0 | 3 | 0 | 0 | 0 | 7 | 22 | 18 | 4 | 82% | 72 | 15-8 | Threw 82% strikes | ||
| Steve Frey | 1991-05-28 | 1991 | L 12-0 @ PHI | 2 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 25 | 19 | 6 | 76% | 93 | 11-5 | Threw 76% strikes | ||
| Brian Barnes | 1991-06-02 | 1991 | L 4-3 vs CHN | 7 | 4 | 2 | 2 | 0 | 0 | 11 | 2 | 0 | 0 | 25 | 93 | 63 | 30 | 68% | 9 | 1-3 | 11 Strikeouts | ||
| Tim Burke | 1991-06-08 | 1991 | L 7-6 @ ATL | L | 0.1 | 2 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 4 | 25 | 19 | 6 | 76% | 415 | 43-25 | Threw 76% strikes | |
| Doug Piatt | 1991-06-11 | 1991 | L 6-1 vs CIN | 2 | 1 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 6 | 21 | 15 | 6 | 71% | 1 | 0-0 | 1st career game | ||
| Bill Sampen | 1991-06-12 | 1991 | W 10-9 vs CIN | 2.1 | 5 | 2 | 2 | 0 | 0 | 1 | 0 | 0 | 0 | 12 | 35 | 29 | 6 | 83% | 79 | 15-8 | Threw 83% strikes | ||
| Jeff Fassero | 1991-06-12 | 1991 | W 10-9 vs CIN | Sv | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 2 | 1 | 67% | 6 | 0-1 | 1st career save | |
| Dennis Martinez | 1991-06-15 | 1991 | W 2-0 vs ATL | W | SHO | 9 | 8 | 0 | 0 | 0 | 2 | 5 | 1 | 0 | 0 | 36 | 139 | 87 | 52 | 63% | 474 | 172-138 | Complete game/Shutout |
| Jeff Fassero | 1991-06-17 | 1991 | W 3-2 vs HOU | W | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 12 | 7 | 5 | 58% | 9 | 1-1 | 1st career win | |
| Chris Haney | 1991-06-21 | 1991 | L 7-3 @ CIN | L | 4 | 3 | 4 | 4 | 2 | 2 | 2 | 0 | 0 | 1 | 18 | 66 | 40 | 26 | 61% | 1 | 0-1 | 1st career game | |
| Oil Can Boyd | 1991-07-07 | 1991 | L 6-1 @ PIT | L | 6 | 7 | 3 | 3 | 0 | 3 | 3 | 0 | 0 | 0 | 27 | 82 | 51 | 31 | 62% | 200 | 74-70 | 200th career game | |
| Jeff Fassero | 1991-07-14 | 1991 | W 3-2 vs LAN | 1.2 | 2 | 0 | 0 | 0 | 0 | 3 | 1 | 0 | 0 | 7 | 27 | 22 | 5 | 81% | 18 | 1-1 | Threw 81% strikes | ||
| Chris Haney | 1991-07-15 | 1991 | W 3-0 vs SDN | W | 6.1 | 7 | 0 | 0 | 0 | 2 | 2 | 1 | 0 | 0 | 27 | 100 | 59 | 41 | 59% | 4 | 1-3 | 1st career win | |
| Oil Can Boyd | 1991-07-19 | 1991 | W 6-0 vs SFN | W | SHO | 9 | 5 | 0 | 0 | 0 | 1 | 8 | 0 | 0 | 0 | 33 | 102 | 71 | 31 | 70% | 202 | 76-70 | Complete game/Shutout |
| Dennis Martinez | 1991-07-28 | 1991 | W 2-0 @ LAN | W | SHO | 9 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 0 | 27 | 96 | 66 | 30 | 69% | 482 | 174-140 | Complete game/Shutout, 0-hitter |
| Dave Wainhouse | 1991-08-03 | 1991 | L 7-1 vs PHI | 2 | 1 | 1 | 1 | 0 | 1 | 0 | 2 | 0 | 0 | 8 | 27 | 16 | 11 | 59% | 1 | 0-0 | 1st career game | ||
| Bill Sampen | 1991-08-15 | 1991 | L 7-6 @ CHN | 3.1 | 2 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 12 | 36 | 28 | 8 | 78% | 87 | 18-9 | Threw 78% strikes | ||
| Dennis Martinez | 1991-08-17 | 1991 | W 3-0 vs SLN | W | SHO | 9 | 6 | 0 | 0 | 0 | 2 | 3 | 0 | 0 | 0 | 34 | 116 | 69 | 47 | 59% | 485 | 175-141 | Complete game/Shutout |
| Chris Nabholz | 1991-09-01 | 1991 | W 6-1 vs HOU | W | CG | 9 | 4 | 1 | 1 | 0 | 4 | 11 | 0 | 0 | 0 | 32 | 133 | 87 | 46 | 65% | 29 | 9-9 | 11 Strikeouts |
| Mel Rojas | 1991-09-06 | 1991 | W 4-1 vs CIN | Sv | 2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 1 | 7 | 24 | 18 | 6 | 75% | 50 | 5-4 | Threw 75% strikes | |
| Doug Piatt | 1991-09-10 | 1991 | L 9-0 @ NYN | 1.2 | 2 | 1 | 0 | 0 | 1 | 4 | 0 | 0 | 0 | 8 | 37 | 24 | 13 | 65% | 12 | 0-0 | Struck out at least 2 batters per inning (1.2+ ip) | ||