| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walter Johnson | MIN | 15.1 | 191807070_BAL_MIN |
| Hippo Vaughn | CHN | 8.7 | 191807090_SFN_CHN |
| Carl Mays | BOS | 3.89 | 191807082_CLE_BOS |
| Stan Coveleski | CLE | 2.93 | 191807081_CLE_BOS |
| Rube Marquard | LAN | 2.07 | 191807071_LAN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill James | DET | -3.95 | 191807092_DET_OAK |
| Jakie May | SLN | -1.57 | 191807072_LAN_SLN |
| Allen Russell | NYA | -1.05 | 191807080_CHA_NYA |
| Vean Gregg | OAK | -0.54 | 191807091_DET_OAK |
| Dick Robertson | LAN | -0.49 | 191807072_LAN_SLN |
Based on accumulated WAA for this season up to 1918-07-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.34 | Walter Johnson | 194.3 | MIN |
| +002+ | 4.67 | Hippo Vaughn | 177.3 | CHN |
| +003+ | 4.46 | Stan Coveleski | 198.7 | CLE |
| +008+ | 3 | Bullet Joe Bush | 175.7 | BOS |
| +009+ | 2.99 | Burleigh Grimes | 135.7 | LAN |
| +011+ | 2.92 | Carl Mays | 174.3 | BOS |
| +019+ | 2.44 | Phil Douglas | 67.3 | CHN |
| +020+ | 2.43 | Red Ames | 114.3 | SLN |
| +021+ | 2.41 | Scott Perry | 197.3 | OAK |
| +023+ | 2.25 | Al Demaree | 102.7 | SFN |
| +024+ | 2.25 | Rube Marquard | 150 | LAN |
| +025+ | 2.19 | Pol Perritt | 124.3 | SFN |
| +034+ | 1.93 | Lefty Tyler | 151 | CHN |
| +036+ | 1.77 | Brad Hogg | 125.7 | PHI |
| +037+ | 1.73 | Allen Sothoron | 130 | BAL |
| +038+ | 1.67 | Guy Morton | 141.7 | CLE |
| +045+ | 1.49 | Dana Fillingim | 113 | ATL |
| +046+ | 1.48 | Eddie Cicotte | 162.3 | CHA |
| +048+ | 1.41 | Frank Shellenback | 108.3 | CHA |
| +050+ | 1.35 | Harry Harper | 141.3 | MIN |
| +051+ | 1.34 | Roy Sanders | 108.3 | PIT |
| +054+ | 1.26 | Jimmy Ring | 29 | CIN |
| XXXXX | 1.22 | Wilbur Cooper | 152 | PIT |
| XXXXX | 1.17 | Joe Oeschger | 116 | PHI |
| XXXXX | 0.94 | George Mogridge | 123 | NYA |
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