| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Tyler | ATL | -1.81 | 191306030_ATL_PIT |
| Ray Fisher | NYA | -1.53 | 191306021_BOS_NYA |
| Boardwalk Brown | OAK | -0.94 | 191306021_OAK_MIN |
| Hooks Dauss | DET | -0.85 | 191306030_DET_OAK |
| Orval Overall | CHN | -0.72 | 191306040_ATL_CHN |
Based on accumulated WAA for this season up to 1913-06-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.96 | Walter Johnson | 103 | MIN |
| +003+ | 3.36 | Cy Falkenberg | 94 | CLE |
| +006+ | 2.96 | Eddie Cicotte | 68 | CHA |
| +008+ | 2.91 | Eddie Plank | 81.3 | OAK |
| +009+ | 2.87 | Nap Rucker | 81.7 | LAN |
| +010+ | 2.76 | Jim Scott | 77 | CHA |
| +011+ | 2.47 | Pete Alexander | 83.3 | PHI |
| +013+ | 2.36 | Larry Cheney | 94.7 | CHN |
| +017+ | 2.13 | Bill Steen | 79.3 | CLE |
| +018+ | 2.01 | Reb Russell | 96 | CHA |
| +019+ | 1.77 | Vean Gregg | 95.3 | CLE |
| +021+ | 1.7 | Ray Keating | 69.7 | NYA |
| +022+ | 1.69 | Babe Adams | 84 | PIT |
| +023+ | 1.66 | Christy Mathewson | 95.7 | SFN |
| +025+ | 1.64 | Tom Seaton | 99.7 | PHI |
| +026+ | 1.61 | Ad Brennan | 50.7 | PHI |
| +028+ | 1.57 | Eddie Stack | 47.3 | LAN |
| +029+ | 1.56 | Chief Bender | 68.3 | OAK |
| +030+ | 1.52 | Red Ames | 58.7 | TOT |
| +033+ | 1.39 | Doc White | 49 | CHA |
| +036+ | 1.36 | Jeff Tesreau | 91 | SFN |
| +038+ | 1.32 | Frank Allen | 74.3 | LAN |
| +041+ | 1.27 | Marc Hall | 77 | DET |
| +042+ | 1.25 | Cliff Curtis | 55 | LAN |
| XXXXX | 1.19 | Joe Engel | 45.3 | MIN |
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