| Starter | Tm | Tier | Game |
|---|---|---|---|
| Chief Johnson | CIN | -1.29 | 191305241_SLN_CIN |
| Boardwalk Brown | OAK | -0.55 | 191305240_MIN_OAK |
| Ed Klepfer | NYA | -0.37 | 191305220_NYA_BAL |
| George Mullin | MIN | -0.26 | 191305240_MIN_OAK |
| Bob Harmon | SLN | -0.24 | 191305242_SLN_CIN |
Based on accumulated WAA for this season up to 1913-05-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.12 | Walter Johnson | 78 | MIN |
| +003+ | 3.25 | Cy Falkenberg | 79 | CLE |
| +004+ | 2.61 | Nap Rucker | 71.7 | LAN |
| +005+ | 2.55 | Pete Alexander | 63.7 | PHI |
| +007+ | 2.31 | Ray Keating | 53.3 | NYA |
| +009+ | 2.24 | Bill Steen | 70.3 | CLE |
| +010+ | 2.17 | Jim Scott | 67 | CHA |
| +012+ | 2.12 | Larry Cheney | 79.7 | CHN |
| +013+ | 1.98 | Eddie Plank | 63.3 | OAK |
| +016+ | 1.9 | Ad Brennan | 50 | PHI |
| +018+ | 1.74 | Tom Seaton | 77.3 | PHI |
| +020+ | 1.68 | Eddie Cicotte | 42 | CHA |
| +022+ | 1.61 | Reb Russell | 71 | CHA |
| +024+ | 1.46 | Cliff Curtis | 45.7 | LAN |
| +025+ | 1.45 | Earl Hamilton | 68.3 | BAL |
| +026+ | 1.38 | Bill James | 60.3 | ATL |
| +029+ | 1.29 | Joe Benz | 45.3 | CHA |
| +030+ | 1.27 | Vean Gregg | 74.7 | CLE |
| XXXXX | 1.21 | Christy Mathewson | 72 | SFN |
| XXXXX | 1.13 | Bob Harmon | 54.3 | SLN |
| XXXXX | 0.98 | Dwight Stone | 46.7 | BAL |
| XXXXX | 0.85 | George Baumgardner | 65.7 | BAL |
| XXXXX | 0.85 | Jean Dubuc | 67 | DET |
| XXXXX | 0.76 | Frank Allen | 63 | LAN |
| XXXXX | 0.74 | Eddie Stack | 26 | LAN |
_