| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walter Johnson | MIN | 9.68 | 191305180_MIN_DET |
| Nap Rucker | LAN | 5.73 | 191305190_SLN_LAN |
| Christy Mathewson | SFN | 4.53 | 191305200_SLN_SFN |
| Pete Alexander | PHI | 3.47 | 191305200_CIN_PHI |
| Ed Walsh | CHA | 2.7 | 191305180_NYA_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Tyler | ATL | -2.29 | 191305190_CIN_ATL |
| Ray Fisher | NYA | -2.17 | 191305190_NYA_BAL |
| Jimmy Lavender | CHN | -1.13 | 191305190_CHN_PHI |
| Roy Mitchell | BAL | -0.85 | 191305180_BOS_BAL |
| Carl Cashion | MIN | -0.73 | 191305190_MIN_CLE |
Based on accumulated WAA for this season up to 1913-05-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.5 | Walter Johnson | 68.7 | MIN |
| +002+ | 3.41 | Cy Falkenberg | 72 | CLE |
| +004+ | 2.76 | Ray Keating | 52.3 | NYA |
| +005+ | 2.53 | Nap Rucker | 71.7 | LAN |
| +006+ | 2.18 | Jim Scott | 64 | CHA |
| +008+ | 1.95 | Pete Alexander | 54.7 | PHI |
| +009+ | 1.89 | Joe Benz | 42 | CHA |
| +012+ | 1.68 | Eddie Cicotte | 42 | CHA |
| +013+ | 1.63 | Bill Steen | 61.3 | CLE |
| +014+ | 1.63 | Larry Cheney | 69.7 | CHN |
| +018+ | 1.51 | Ad Brennan | 41 | PHI |
| +023+ | 1.4 | Vean Gregg | 73.3 | CLE |
| +025+ | 1.37 | Bill James | 60.3 | ATL |
| +027+ | 1.34 | Eddie Plank | 54.3 | OAK |
| +028+ | 1.34 | Reb Russell | 61 | CHA |
| +030+ | 1.28 | Jean Dubuc | 64 | DET |
| XXXXX | 1.2 | Christy Mathewson | 72 | SFN |
| XXXXX | 1.12 | Tom Seaton | 68.3 | PHI |
| XXXXX | 1.07 | Cliff Curtis | 40.7 | LAN |
| XXXXX | 0.9 | Carl Zamloch | 16 | DET |
| XXXXX | 0.87 | Roy Mitchell | 51 | BAL |
| XXXXX | 0.85 | George Baumgardner | 65.7 | BAL |
| XXXXX | 0.83 | Earl Hamilton | 59.3 | BAL |
| XXXXX | 0.81 | Bob Harmon | 46.3 | SLN |
| XXXXX | 0.71 | Eddie Stack | 26 | LAN |
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