| Starter | Tm | Tier | Game |
|---|---|---|---|
| Andy Messersmith | LAN | 7.91 | 197505310_LAN_CHN |
| Tom Seaver | NYN | 6.69 | 197505310_SDN_NYN |
| Jim Palmer | BAL | 6.48 | 197505300_BAL_ANA |
| Bert Blyleven | MIN | 5.75 | 197505310_BOS_MIN |
| Ken Holtzman | OAK | 3.18 | 197505310_CLE_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Bibby | TEX | -2.39 | 197505300_NYA_TEX |
| J.R. Richard | HOU | -2.38 | 197505310_HOU_PHI |
| Roric Harrison | ATL | -2.2 | 197505310_ATL_PIT |
| Dick Bosman | OAK | -1.42 | 197505300_CLE_OAK |
| Clay Kirby | CIN | -0.94 | 197505300_CIN_SLN |
Based on accumulated WAA for this season up to 1975-05-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.65 | Don Sutton | 105.7 | LAN |
| +002+ | 4.05 | Jim Palmer | 91 | BAL |
| +003+ | 3.57 | Randy Jones | 81 | SDN |
| +004+ | 3.32 | Andy Messersmith | 110 | LAN |
| +007+ | 2.95 | Jim Hughes | 59.3 | MIN |
| +009+ | 2.86 | Steve Stone | 45.3 | CHN |
| +011+ | 2.77 | Tom Seaver | 86.7 | NYN |
| +013+ | 2.6 | Jim Lonborg | 80.7 | PHI |
| +015+ | 2.53 | Dennis Eckersley | 32.3 | CLE |
| +016+ | 2.5 | Steve Busby | 92.3 | KCA |
| +017+ | 2.48 | Don Gullett | 85.3 | CIN |
| +019+ | 2.33 | Joe McIntosh | 73.7 | SDN |
| +020+ | 2.32 | Jim Kaat | 88.3 | CHA |
| +022+ | 2.24 | Tom Underwood | 64 | PHI |
| +023+ | 2.17 | Jim Barr | 81.7 | SFN |
| +024+ | 2.13 | Phil Niekro | 81 | ATL |
| +026+ | 2.04 | Vida Blue | 93.7 | OAK |
| +029+ | 1.94 | Gary Nolan | 76.3 | CIN |
| +036+ | 1.78 | Nolan Ryan | 86.7 | ANA |
| +043+ | 1.49 | Woodie Fryman | 54 | WAS |
| +044+ | 1.49 | John Montefusco | 58.3 | SFN |
| +047+ | 1.45 | Steve Rogers | 63.3 | WAS |
| +054+ | 1.4 | Jim Hunter | 105 | NYA |
| +057+ | 1.38 | Bill Hands | 62 | TEX |
| +060+ | 1.32 | Gaylord Perry | 97.3 | CLE |
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