| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jerry Reuss | LAN | 5.2 | 198105070_LAN_PHI |
| Tommy John | NYA | 5.2 | 198105070_NYA_ANA |
| Joe Niekro | HOU | 4.41 | 198105050_HOU_CHN |
| Phil Niekro | ATL | 3.08 | 198105070_ATL_SLN |
| Larry Gura | KCA | 2.53 | 198105050_BOS_KCA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Parrott | SEA | -3.03 | 198105060_MIL_SEA |
| Frank Tanana | BOS | -1.65 | 198105050_BOS_KCA |
| Ray Burris | WAS | -1.01 | 198105060_SDN_WAS |
| Milt Wilcox | DET | -0.98 | 198105060_DET_OAK |
| Jackson Todd | TOR | -0.96 | 198105060_CLE_TOR |
Based on accumulated WAA for this season up to 1981-05-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.81 | Fernando Valenzuela | 54 | LAN |
| +005+ | 2.02 | Bob Knepper | 36.7 | HOU |
| +007+ | 1.9 | Jerry Reuss | 35 | LAN |
| +008+ | 1.85 | Matt Keough | 47.3 | OAK |
| +009+ | 1.78 | Larry Gura | 48.3 | KCA |
| +010+ | 1.77 | Doyle Alexander | 40.7 | SFN |
| +011+ | 1.61 | Steve McCatty | 47 | OAK |
| +015+ | 1.5 | Mike Norris | 51 | OAK |
| +016+ | 1.48 | Brian Kingman | 34.7 | OAK |
| +022+ | 1.3 | Gaylord Perry | 44.3 | ATL |
| +023+ | 1.25 | Rudy May | 46 | NYA |
| XXXXX | 1.24 | Tommy John | 51 | NYA |
| XXXXX | 1.23 | Milt Wilcox | 43.3 | DET |
| XXXXX | 1.16 | Jerry Augustine | 15 | MIL |
| XXXXX | 1.15 | Bert Blyleven | 35 | CLE |
| XXXXX | 1.11 | Bryan Clark | 24.7 | SEA |
| XXXXX | 1.1 | Scott Sanderson | 35.3 | WAS |
| XXXXX | 1.09 | Joe Niekro | 49 | HOU |
| XXXXX | 1.03 | Nolan Ryan | 26.7 | HOU |
| XXXXX | 0.97 | Tom Seaver | 43.3 | CIN |
| XXXXX | 0.96 | Phil Niekro | 35 | ATL |
| XXXXX | 0.94 | Steve Renko | 22 | ANA |
| XXXXX | 0.91 | Len Barker | 24.3 | CLE |
| XXXXX | 0.91 | Steve Trout | 28.7 | CHA |
| XXXXX | 0.88 | Steve Carlton | 51 | PHI |
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