| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rudy May | NYA | 6.59 | 198105140_OAK_NYA |
| Fernando Valenzuela | LAN | 4.9 | 198105140_WAS_LAN |
| Joe Niekro | HOU | 3.51 | 198105150_CHN_HOU |
| Steve Carlton | PHI | 3.5 | 198105150_PHI_SDN |
| Larry Gura | KCA | 2.3 | 198105160_KCA_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tim Lollar | SDN | -2.9 | 198105160_PHI_SDN |
| Bob Sykes | SLN | -2.62 | 198105140_SLN_HOU |
| Paul Splittorff | KCA | -2.34 | 198105140_TEX_KCA |
| Mike LaCoss | CIN | -1.77 | 198105160_CIN_PIT |
| Frank Tanana | BOS | -1.64 | 198105140_BOS_MIN |
Based on accumulated WAA for this season up to 1981-05-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.91 | Fernando Valenzuela | 72 | LAN |
| +003+ | 2.59 | Bob Knepper | 45.7 | HOU |
| +004+ | 2.38 | Doyle Alexander | 47.7 | SFN |
| +005+ | 2.35 | Nolan Ryan | 42.7 | HOU |
| +008+ | 2.14 | Steve McCatty | 60.7 | OAK |
| +010+ | 2.08 | Bryan Clark | 41.3 | SEA |
| +011+ | 2.01 | Len Barker | 41.3 | CLE |
| +013+ | 1.87 | Joe Niekro | 63 | HOU |
| +014+ | 1.85 | Vida Blue | 54 | SFN |
| +015+ | 1.84 | Tom Seaver | 61.3 | CIN |
| +017+ | 1.8 | Burt Hooton | 56.7 | LAN |
| +018+ | 1.76 | Jerry Reuss | 43 | LAN |
| +019+ | 1.68 | Matt Keough | 55 | OAK |
| +021+ | 1.61 | Milt Wilcox | 52.3 | DET |
| +022+ | 1.59 | Bert Blyleven | 44 | CLE |
| +026+ | 1.54 | Brian Kingman | 48 | OAK |
| +028+ | 1.48 | Phil Niekro | 44 | ATL |
| +029+ | 1.46 | Geoff Zahn | 61.3 | ANA |
| +033+ | 1.35 | Gaylord Perry | 53.3 | ATL |
| +034+ | 1.32 | Scott Sanderson | 42.3 | WAS |
| +036+ | 1.29 | Andy Rincon | 35.7 | SLN |
| XXXXX | 1.05 | Steve Trout | 33.7 | CHA |
| XXXXX | 1.04 | Rudy May | 60.7 | NYA |
| XXXXX | 1.02 | Juan Eichelberger | 46.3 | SDN |
| XXXXX | 0.98 | Doug Bird | 27 | NYA |
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