| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Welch | OAK | 4.21 | 199104260_ANA_OAK |
| Bruce Hurst | SDN | 3.76 | 199104260_SDN_PHI |
| Frank Viola | NYN | 3.09 | 199104260_PIT_NYN |
| Norm Charlton | CIN | 2.25 | 199104270_CHN_CIN |
| Zane Smith | PIT | 1.82 | 199104260_PIT_NYN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Kevin Gross | LAN | -5.96 | 199104280_SFN_LAN |
| Jack Morris | MIN | -5.41 | 199104280_SEA_MIN |
| Don August | MIL | -3.29 | 199104270_MIL_BAL |
| Melido Perez | CHA | -2.42 | 199104270_NYA_CHA |
| Walt Terrell | DET | -2.29 | 199104260_DET_TOR |
Based on accumulated WAA for this season up to 1991-04-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 2.48 | Roger Clemens | 32 | BOS |
| +003+ | 2.03 | Frank Viola | 31.3 | NYN |
| +004+ | 1.93 | Tim Belcher | 29.7 | LAN |
| +008+ | 1.6 | Tom Candiotti | 29 | CLE |
| +009+ | 1.57 | Bob Welch | 32.7 | OAK |
| +011+ | 1.51 | Pete Harnisch | 25.7 | HOU |
| +012+ | 1.44 | Tom Gordon | 19 | KCA |
| +014+ | 1.38 | Vicente Palacios | 18.7 | PIT |
| +015+ | 1.37 | Dennis Martinez | 27.7 | WAS |
| +016+ | 1.36 | Charles Nagy | 28.7 | CLE |
| +018+ | 1.33 | Greg Hibbard | 29 | CHA |
| XXXXX | 1.23 | Mike Boddicker | 31 | KCA |
| XXXXX | 1.22 | Scott Erickson | 31 | MIN |
| XXXXX | 1.2 | Mike Morgan | 23.7 | LAN |
| XXXXX | 1.2 | Jimmy Key | 29 | TOR |
| XXXXX | 1.17 | Jose DeLeon | 23.3 | SLN |
| XXXXX | 1.13 | Kevin Tapani | 30 | MIN |
| XXXXX | 1.11 | Chris Bosio | 31 | MIL |
| XXXXX | 1.03 | Ramon Martinez | 29 | LAN |
| XXXXX | 0.99 | Chris Hammond | 22 | CIN |
| XXXXX | 0.95 | Dwight Gooden | 31 | NYN |
| XXXXX | 0.94 | Bruce Hurst | 29 | SDN |
| XXXXX | 0.91 | Shawn Boskie | 28 | CHN |
| XXXXX | 0.91 | Tom Bolton | 18.3 | BOS |
| XXXXX | 0.9 | Tom Browning | 31 | CIN |
_