| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walter Johnson | MIN | 15.8 | 191806300_BOS_MIN |
| Hippo Vaughn | CHN | 5.83 | 191806290_CHN_CIN |
| Stan Coveleski | CLE | 4.19 | 191806301_DET_CLE |
| Carl Mays | BOS | 3.23 | 191806300_BOS_MIN |
| Eddie Cicotte | CHA | 2.68 | 191806281_BAL_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dave Davenport | BAL | -4.77 | 191806282_BAL_CHA |
| Bill James | DET | -3.72 | 191806290_DET_CLE |
| Jack Coombs | LAN | -2.03 | 191806291_LAN_ATL |
| Happy Finneran | NYA | -1.41 | 191806280_NYA_OAK |
| Bob Steele | PIT | -1.09 | 191806301_PIT_SLN |
Based on accumulated WAA for this season up to 1918-06-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.12 | Walter Johnson | 176.3 | MIN |
| +002+ | 4.06 | Hippo Vaughn | 149 | CHN |
| +004+ | 3.83 | Stan Coveleski | 180.3 | CLE |
| +008+ | 2.81 | Dana Fillingim | 89 | ATL |
| +014+ | 2.67 | Carl Mays | 154.7 | BOS |
| +015+ | 2.63 | Bullet Joe Bush | 144.3 | BOS |
| +023+ | 2.12 | Frank Shellenback | 94 | CHA |
| +026+ | 1.92 | Al Demaree | 82 | SFN |
| +027+ | 1.91 | Burleigh Grimes | 117.7 | LAN |
| +028+ | 1.87 | Red Ames | 103.3 | SLN |
| +030+ | 1.79 | Slim Sallee | 106 | SFN |
| +032+ | 1.79 | Phil Douglas | 47.7 | CHN |
| +034+ | 1.64 | Pol Perritt | 100.3 | SFN |
| +036+ | 1.61 | Rube Marquard | 126 | LAN |
| +038+ | 1.58 | Scott Perry | 172.3 | OAK |
| +042+ | 1.41 | Guy Morton | 125.3 | CLE |
| +046+ | 1.29 | Lefty Tyler | 132 | CHN |
| XXXXX | 1.04 | Eddie Cicotte | 140.3 | CHA |
| XXXXX | 1 | Lee Meadows | 68.3 | SLN |
| XXXXX | 1 | Hooks Dauss | 125 | DET |
| XXXXX | 0.94 | Harry Harper | 123 | MIN |
| XXXXX | 0.94 | Wilbur Cooper | 132 | PIT |
| XXXXX | 0.89 | Leon Cadore | 17 | LAN |
| XXXXX | 0.89 | Allen Sothoron | 112 | BAL |
| XXXXX | 0.81 | Bunny Hearn | 126.3 | ATL |
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