| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dave Stieb | TOR | 7.16 | 198409150_TOR_DET |
| Mike Boddicker | BAL | 5.89 | 198409140_BAL_MIL |
| Larry McWilliams | PIT | 4.27 | 198409130_PIT_NYN |
| John Denny | PHI | 3.74 | 198409130_SLN_PHI |
| Orel Hershiser | LAN | 3.38 | 198409150_LAN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Neal Heaton | CLE | -6.7 | 198409140_CLE_OAK |
| Jim Clancy | TOR | -3.34 | 198409140_TOR_DET |
| Mike Moore | SEA | -3.15 | 198409130_TEX_SEA |
| Chris Codiroli | OAK | -2.82 | 198409140_CLE_OAK |
| Jim Slaton | ANA | -2.37 | 198409130_CLE_ANA |
Based on accumulated WAA for this season up to 1984-09-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 7.2 | Dave Stieb | 245.3 | TOR |
| +009+ | 6.2 | Mike Boddicker | 237.3 | BAL |
| +018+ | 5.18 | Joe Niekro | 223.7 | HOU |
| +019+ | 5.16 | John Denny | 132.7 | PHI |
| +020+ | 5.14 | Dwight Gooden | 202 | NYN |
| +022+ | 5.09 | Charlie Lea | 220.3 | WAS |
| +023+ | 5.04 | Larry McWilliams | 209 | PIT |
| +024+ | 5.01 | Orel Hershiser | 169.7 | LAN |
| +027+ | 4.78 | Rick Rhoden | 215.7 | PIT |
| +033+ | 4.34 | Bert Blyleven | 210.7 | CLE |
| +035+ | 4.25 | Phil Niekro | 211.3 | NYA |
| +037+ | 4.14 | Ray Burris | 196.7 | OAK |
| +038+ | 4.13 | Storm Davis | 202.3 | BAL |
| +039+ | 4.07 | Fernando Valenzuela | 238 | LAN |
| +042+ | 4 | Dan Schatzeder | 123 | WAS |
| +044+ | 3.92 | John Candelaria | 179.3 | PIT |
| +047+ | 3.8 | Frank Viola | 225.7 | MIN |
| +048+ | 3.78 | Rick Honeycutt | 182 | LAN |
| +050+ | 3.77 | Ricky Mahler | 191.3 | ATL |
| +053+ | 3.54 | Jerry Koosman | 209.7 | PHI |
| +060+ | 3.4 | Bob Knepper | 210.7 | HOU |
| +061+ | 3.39 | John Butcher | 202.3 | MIN |
| +068+ | 3.19 | Nolan Ryan | 182.3 | HOU |
| +069+ | 3.13 | Mark Langston | 208.7 | SEA |
| +071+ | 3.08 | Bryn Smith | 169.3 | WAS |
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