| Starter | Tm | Tier | Game |
|---|---|---|---|
| John Tudor | SLN | 6.42 | 198806230_PHI_SLN |
| Mike Scott | HOU | 5.92 | 198806210_CIN_HOU |
| Ron Darling | NYN | 3.65 | 198806210_PIT_NYN |
| Rick Reuschel | SFN | 3.35 | 198806210_SDN_SFN |
| Frank Viola | MIN | 3.01 | 198806220_ANA_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ed Whitson | SDN | -3.18 | 198806220_SDN_SFN |
| Willie Fraser | ANA | -3.1 | 198806220_ANA_MIN |
| Brian Fisher | PIT | -2.14 | 198806230_PIT_WAS |
| Steve Trout | SEA | -1.79 | 198806210_SEA_TEX |
| Jeff Sellers | BOS | -1.4 | 198806210_BOS_CLE |
Based on accumulated WAA for this season up to 1988-06-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.13 | Roger Clemens | 134.3 | BOS |
| +003+ | 5.06 | John Tudor | 83.3 | SLN |
| +004+ | 4.9 | Greg Maddux | 130.7 | CHN |
| +006+ | 4.43 | David Cone | 88.7 | NYN |
| +010+ | 3.82 | Frank Viola | 117.7 | MIN |
| +011+ | 3.79 | Teddy Higuera | 102.3 | MIL |
| +012+ | 3.73 | Bob Knepper | 88.3 | HOU |
| +013+ | 3.68 | Larry McWilliams | 84.3 | SLN |
| +014+ | 3.45 | Ron Darling | 113.3 | NYN |
| +018+ | 3.27 | Orel Hershiser | 111.3 | LAN |
| +019+ | 3.21 | Bob Walk | 95.3 | PIT |
| +021+ | 3.04 | Pascual Perez | 61 | WAS |
| +026+ | 2.9 | Kevin Gross | 113.3 | PHI |
| +030+ | 2.76 | Dave Stieb | 98.7 | TOR |
| +031+ | 2.76 | Dave LaPoint | 102 | CHA |
| +034+ | 2.64 | Mark Gubicza | 115.7 | KCA |
| +038+ | 2.47 | Paul Kilgus | 104 | TEX |
| +044+ | 2.25 | Jeff Russell | 73 | TEX |
| +045+ | 2.24 | Tom Candiotti | 118.7 | CLE |
| +048+ | 2.12 | Jose Rijo | 68 | CIN |
| +050+ | 2.11 | Dennis Martinez | 103 | WAS |
| +052+ | 2.05 | John Candelaria | 93 | NYA |
| +055+ | 2.03 | Chris Bosio | 115.3 | MIL |
| +057+ | 1.99 | Jim Deshaies | 85.3 | HOU |
| +058+ | 1.97 | Rick Reuschel | 96.7 | SFN |
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