| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dave Stieb | TOR | 7.55 | 198409200_MIL_TOR |
| Orel Hershiser | LAN | 3.76 | 198409200_LAN_HOU |
| Joe Niekro | HOU | 3.75 | 198409210_CIN_HOU |
| Bert Blyleven | CLE | 3.24 | 198409220_CLE_MIN |
| Frank Viola | MIN | 3.12 | 198409200_CHA_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Matt Young | SEA | -5.3 | 198409220_SEA_CHA |
| Mike Scott | HOU | -1.4 | 198409220_CIN_HOU |
| Dick Ruthven | CHN | -1.37 | 198409200_PIT_CHN |
| Mike Krukow | SFN | -1.35 | 198409200_SFN_SDN |
| Tommy John | ANA | -1.16 | 198409220_TEX_ANA |
Based on accumulated WAA for this season up to 1984-09-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +006+ | 7.16 | Dave Stieb | 253.7 | TOR |
| +009+ | 6.15 | Alejandro Pena | 201 | LAN |
| +015+ | 5.75 | Mike Boddicker | 245.3 | BAL |
| +016+ | 5.74 | Dwight Gooden | 210.3 | NYN |
| +018+ | 5.45 | Orel Hershiser | 178.7 | LAN |
| +023+ | 5.05 | Rick Rhoden | 230.7 | PIT |
| +024+ | 4.91 | Charlie Lea | 224.3 | WAS |
| +025+ | 4.78 | Joe Niekro | 236 | HOU |
| +026+ | 4.72 | John Denny | 139.3 | PHI |
| +027+ | 4.66 | Bert Blyleven | 227.7 | CLE |
| +033+ | 4.52 | Frank Viola | 243.3 | MIN |
| +036+ | 4.34 | Fernando Valenzuela | 252 | LAN |
| +038+ | 4.28 | Larry McWilliams | 214.7 | PIT |
| +039+ | 4.24 | John Candelaria | 183 | PIT |
| +040+ | 4.08 | Ray Burris | 204.7 | OAK |
| +041+ | 3.94 | Ricky Mahler | 207 | ATL |
| +043+ | 3.88 | Doyle Alexander | 245 | TOR |
| +044+ | 3.85 | Rick Honeycutt | 182 | LAN |
| +047+ | 3.77 | Buddy Black | 246.7 | KCA |
| +052+ | 3.57 | Dan Schatzeder | 129.3 | WAS |
| +053+ | 3.52 | Storm Davis | 215.7 | BAL |
| +056+ | 3.47 | Mark Langston | 216.7 | SEA |
| +062+ | 3.42 | John Butcher | 217 | MIN |
| +063+ | 3.41 | Phil Niekro | 215.3 | NYA |
| +070+ | 3.28 | Nolan Ryan | 183.7 | HOU |
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