| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Morris | MIN | -4.8 | 199105030_MIN_MIL |
| Melido Perez | CHA | -3.34 | 199105040_BOS_CHA |
| Jeff Robinson | BAL | -1.83 | 199105040_BAL_ANA |
| Jamie Moyer | SLN | -1.72 | 199105040_SLN_CIN |
| Storm Davis | KCA | -1.25 | 199105030_TOR_KCA |
Based on accumulated WAA for this season up to 1991-05-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 2.91 | Roger Clemens | 41 | BOS |
| +002+ | 2.17 | Tom Candiotti | 38 | CLE |
| +003+ | 2.14 | Dennis Martinez | 36.7 | WAS |
| +004+ | 2.08 | Scott Erickson | 40 | MIN |
| +005+ | 2.08 | Pete Harnisch | 33.7 | HOU |
| +007+ | 1.81 | Bob Welch | 40 | OAK |
| +010+ | 1.77 | Mike Morgan | 31.7 | LAN |
| +011+ | 1.72 | Charles Nagy | 37.7 | CLE |
| +013+ | 1.7 | Ramon Martinez | 38 | LAN |
| +014+ | 1.65 | Tim Belcher | 32.7 | LAN |
| +016+ | 1.53 | Tom Bolton | 25 | BOS |
| +015+ | 1.53 | Frank Viola | 37.3 | NYN |
| +018+ | 1.43 | Zane Smith | 35.7 | PIT |
| XXXXX | 1.19 | Kevin Tapani | 37 | MIN |
| XXXXX | 1.19 | Tom Browning | 38.7 | CIN |
| XXXXX | 1.18 | Jimmy Key | 35 | TOR |
| XXXXX | 1.14 | Vicente Palacios | 22.7 | PIT |
| XXXXX | 1.12 | Norm Charlton | 35.3 | CIN |
| XXXXX | 1.08 | Dwight Gooden | 37 | NYN |
| XXXXX | 1.03 | Chris Hammond | 22 | CIN |
| XXXXX | 0.99 | Jose DeLeon | 28.3 | SLN |
| XXXXX | 0.85 | Tom Glavine | 32.3 | ATL |
| XXXXX | 0.77 | Dan Petry | 16.3 | DET |
| XXXXX | 0.67 | Joe Slusarski | 17.3 | OAK |
| XXXXX | 0.66 | Jose Mesa | 31.3 | BAL |
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