| 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 |
|---|---|---|---|
| Don August | MIL | -3.29 | 199104270_MIL_BAL |
| Melido Perez | CHA | -2.42 | 199104270_NYA_CHA |
| Walt Terrell | DET | -2.29 | 199104260_DET_TOR |
| Jeff Robinson | BAL | -2.25 | 199104270_MIL_BAL |
| Ken Hill | SLN | -1.14 | 199104270_WAS_SLN |
Based on accumulated WAA for this season up to 1991-04-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 2.47 | Roger Clemens | 32 | BOS |
| +002+ | 2.01 | Frank Viola | 31.3 | NYN |
| +003+ | 1.92 | Tim Belcher | 29.7 | LAN |
| +007+ | 1.59 | Tom Candiotti | 29 | CLE |
| +008+ | 1.56 | Bob Welch | 32.7 | OAK |
| +010+ | 1.5 | Pete Harnisch | 25.7 | HOU |
| +012+ | 1.38 | Vicente Palacios | 18.7 | PIT |
| +013+ | 1.36 | Dennis Martinez | 27.7 | WAS |
| +014+ | 1.35 | Charles Nagy | 28.7 | CLE |
| +015+ | 1.31 | Greg Hibbard | 29 | CHA |
| XXXXX | 1.22 | Mike Boddicker | 31 | KCA |
| XXXXX | 1.21 | Scott Erickson | 31 | MIN |
| XXXXX | 1.2 | Mike Morgan | 23.7 | LAN |
| XXXXX | 1.19 | Jimmy Key | 29 | TOR |
| XXXXX | 1.17 | Jose DeLeon | 23.3 | SLN |
| XXXXX | 1.12 | Kevin Tapani | 30 | MIN |
| XXXXX | 1.09 | John Smiley | 22.7 | PIT |
| XXXXX | 1.08 | Chris Bosio | 31 | MIL |
| XXXXX | 1.04 | Tom Gordon | 12 | KCA |
| XXXXX | 1.02 | Ramon Martinez | 29 | LAN |
| XXXXX | 0.94 | Dwight Gooden | 31 | NYN |
| XXXXX | 0.91 | Bruce Hurst | 29 | SDN |
| XXXXX | 0.91 | Tom Bolton | 18.3 | BOS |
| XXXXX | 0.89 | Tom Browning | 31 | CIN |
| XXXXX | 0.89 | Shawn Boskie | 28 | CHN |
_