| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Carlton | PHI | 5.27 | 198105040_SFN_PHI |
| Joe Niekro | HOU | 4.41 | 198105050_HOU_CHN |
| Steve Rogers | WAS | 3.04 | 198105040_LAN_WAS |
| Larry Gura | KCA | 2.53 | 198105050_BOS_KCA |
| Gaylord Perry | ATL | 2.44 | 198105060_ATL_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Parrott | SEA | -3.03 | 198105060_MIL_SEA |
| Rich Gale | KCA | -2.35 | 198105040_BOS_KCA |
| Frank Tanana | BOS | -1.65 | 198105050_BOS_KCA |
| Mike Krukow | CHN | -1.47 | 198105040_HOU_CHN |
| Bob Walk | ATL | -1.1 | 198105040_ATL_SLN |
Based on accumulated WAA for this season up to 1981-05-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.86 | Fernando Valenzuela | 54 | LAN |
| +002+ | 2.33 | Matt Keough | 45 | OAK |
| +005+ | 1.86 | Doyle Alexander | 33.7 | SFN |
| +006+ | 1.83 | Larry Gura | 48.3 | KCA |
| +009+ | 1.65 | Steve McCatty | 47 | OAK |
| +010+ | 1.55 | Mike Norris | 51 | OAK |
| +012+ | 1.51 | Brian Kingman | 34.7 | OAK |
| +013+ | 1.43 | Jerry Reuss | 26 | LAN |
| +014+ | 1.35 | Rick Waits | 27 | CLE |
| +015+ | 1.34 | Gaylord Perry | 44.3 | ATL |
| +016+ | 1.34 | Bob Knepper | 27.7 | HOU |
| +023+ | 1.28 | Rudy May | 46 | NYA |
| +024+ | 1.26 | Milt Wilcox | 43.3 | DET |
| XXXXX | 1.17 | Jerry Augustine | 15 | MIL |
| XXXXX | 1.16 | Bert Blyleven | 35 | CLE |
| XXXXX | 1.13 | Bryan Clark | 24.7 | SEA |
| XXXXX | 1.12 | Joe Niekro | 49 | HOU |
| XXXXX | 1.05 | Nolan Ryan | 26.7 | HOU |
| XXXXX | 1.04 | Tommy John | 43 | NYA |
| XXXXX | 1.02 | Tom Seaver | 43.3 | CIN |
| XXXXX | 0.96 | Steve Renko | 22 | ANA |
| XXXXX | 0.93 | Steve Carlton | 51 | PHI |
| XXXXX | 0.92 | Len Barker | 24.3 | CLE |
| XXXXX | 0.88 | Lary Sorensen | 36.7 | SLN |
| XXXXX | 0.87 | Vida Blue | 37 | SFN |
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