| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rick Reuschel | SFN | 7.05 | 198905280_PHI_SFN |
| Dwight Gooden | NYN | 5.73 | 198905280_NYN_LAN |
| Mike Scott | HOU | 5.44 | 198905280_HOU_PIT |
| Dennis Martinez | WAS | 4.27 | 198905300_WAS_LAN |
| Doug Drabek | PIT | 3.05 | 198905300_CIN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Smithson | BOS | -3.32 | 198905300_OAK_BOS |
| Mike Birkbeck | MIL | -2.19 | 198905290_ANA_MIL |
| Rich Dotson | NYA | -1.52 | 198905290_SEA_NYA |
| Don Carman | PHI | -1.5 | 198905300_PHI_SDN |
| Bob Knepper | HOU | -1.24 | 198905290_HOU_SLN |
Based on accumulated WAA for this season up to 1989-05-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 3.65 | Kirk McCaskill | 73 | ANA |
| +004+ | 3.34 | Mike Morgan | 60.3 | LAN |
| +005+ | 3.02 | Mike Moore | 74.3 | OAK |
| +006+ | 2.86 | Chuck Finley | 68.7 | ANA |
| +007+ | 2.82 | Mike Bielecki | 55.3 | CHN |
| +009+ | 2.68 | Doug Drabek | 77.3 | PIT |
| +010+ | 2.65 | Rick Reuschel | 79.7 | SFN |
| +011+ | 2.64 | Ed Whitson | 83.3 | SDN |
| +014+ | 2.59 | Bryn Smith | 62.3 | WAS |
| +018+ | 2.33 | Dwight Gooden | 80 | NYN |
| +022+ | 2.22 | Jose Rijo | 61.3 | CIN |
| +025+ | 2.17 | John Smoltz | 74 | ATL |
| +026+ | 2.12 | Bert Blyleven | 72.3 | ANA |
| +028+ | 2.02 | Greg Swindell | 79.7 | CLE |
| +029+ | 1.99 | Orel Hershiser | 77 | LAN |
| +033+ | 1.92 | Jeff Ballard | 60.3 | BAL |
| +035+ | 1.9 | Mark Gubicza | 95.3 | KCA |
| +042+ | 1.8 | Chris Bosio | 76.7 | MIL |
| +041+ | 1.8 | Todd Burns | 35.7 | OAK |
| +043+ | 1.79 | Doyle Alexander | 78 | DET |
| +047+ | 1.72 | Mike Scott | 80 | HOU |
| +048+ | 1.71 | Ken Hill | 64.3 | SLN |
| +050+ | 1.69 | Jimmy Key | 83 | TOR |
| +051+ | 1.65 | Bret Saberhagen | 87.3 | KCA |
| +052+ | 1.63 | Dennis Martinez | 80.7 | WAS |
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