| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rudy May | NYA | 5.46 | 198105190_KCA_NYA |
| Fernando Valenzuela | LAN | 5.02 | 198105180_PHI_LAN |
| Joe Niekro | HOU | 4.86 | 198105200_HOU_SLN |
| Phil Niekro | ATL | 4.66 | 198105190_ATL_PIT |
| Steve Carlton | PHI | 4.19 | 198105200_PHI_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Torrez | BOS | -4.7 | 198105180_SEA_BOS |
| Dan Spillner | CLE | -2.6 | 198105190_ANA_CLE |
| Paul Splittorff | KCA | -1.98 | 198105180_KCA_NYA |
| Bob Walk | ATL | -1.49 | 198105200_ATL_PIT |
| Mike Scott | NYN | -1.44 | 198105190_NYN_SFN |
Based on accumulated WAA for this season up to 1981-05-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.66 | Fernando Valenzuela | 79 | LAN |
| +003+ | 2.98 | Bob Knepper | 53 | HOU |
| +004+ | 2.48 | Doyle Alexander | 54.3 | SFN |
| +006+ | 2.36 | Nolan Ryan | 42.7 | HOU |
| +007+ | 2.29 | Jerry Reuss | 52 | LAN |
| +008+ | 2.28 | Tom Seaver | 66.3 | CIN |
| +010+ | 2.2 | Bert Blyleven | 54 | CLE |
| +011+ | 2.11 | Len Barker | 50.3 | CLE |
| +013+ | 2.06 | Joe Niekro | 73 | HOU |
| +015+ | 1.96 | Burt Hooton | 63.7 | LAN |
| +016+ | 1.83 | Vida Blue | 54 | SFN |
| +018+ | 1.73 | Scott Sanderson | 50 | WAS |
| +020+ | 1.72 | Steve McCatty | 67.3 | OAK |
| +022+ | 1.61 | Brian Kingman | 48 | OAK |
| +024+ | 1.57 | Matt Keough | 63 | OAK |
| +026+ | 1.53 | Bryan Clark | 47 | SEA |
| +032+ | 1.42 | Steve Carlton | 77 | PHI |
| +039+ | 1.39 | Doug Bird | 32 | NYA |
| +036+ | 1.39 | Scott McGregor | 42 | BAL |
| +042+ | 1.31 | Allen Ripley | 55.3 | SFN |
| +044+ | 1.3 | Andy Rincon | 35.7 | SLN |
| XXXXX | 1.22 | Steve Trout | 40.7 | CHA |
| XXXXX | 1.17 | Rick Rhoden | 47.7 | PIT |
| XXXXX | 1.16 | Ken Forsch | 59.7 | ANA |
| XXXXX | 0.99 | Mario Soto | 58.3 | CIN |
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