| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 9.33 | 198906090_CIN_LAN |
| Dwight Gooden | NYN | 6.58 | 198906070_NYN_CHN |
| Mike Scott | HOU | 6.58 | 198906070_SDN_HOU |
| Mark Gubicza | KCA | 6.21 | 198906070_KCA_SEA |
| Doug Drabek | PIT | 3.64 | 198906090_NYN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jerry Reuss | CHA | -3.08 | 198906090_CHA_MIN |
| Bill Swift | SEA | -1.77 | 198906070_KCA_SEA |
| Bob Knepper | HOU | -1.57 | 198906080_SDN_HOU |
| Zane Smith | ATL | -0.66 | 198906070_LAN_ATL |
| Mike Boddicker | BOS | -0.5 | 198906080_BOS_NYA |
Based on accumulated WAA for this season up to 1989-06-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 3.56 | Chuck Finley | 85.7 | ANA |
| +005+ | 3.5 | Mike Morgan | 73.3 | LAN |
| +007+ | 3.38 | Mike Moore | 87.7 | OAK |
| +010+ | 3.03 | Ed Whitson | 91.3 | SDN |
| +011+ | 2.98 | Rick Reuschel | 94.7 | SFN |
| +013+ | 2.88 | Greg Swindell | 95.7 | CLE |
| +015+ | 2.76 | Kirk McCaskill | 83.7 | ANA |
| +018+ | 2.68 | Bert Blyleven | 80.3 | ANA |
| +021+ | 2.62 | Mark Gubicza | 112.3 | KCA |
| +022+ | 2.59 | Jeff Ballard | 72.3 | BAL |
| +023+ | 2.55 | Mike Scott | 97.3 | HOU |
| +028+ | 2.39 | Mike Bielecki | 67 | CHN |
| +032+ | 2.3 | Doug Drabek | 87.7 | PIT |
| +034+ | 2.29 | John Smoltz | 89.3 | ATL |
| +036+ | 2.24 | Bryn Smith | 75.3 | WAS |
| +037+ | 2.21 | Dennis Martinez | 97 | WAS |
| +038+ | 2.2 | Dwight Gooden | 93 | NYN |
| +042+ | 2.1 | Ken Hill | 75.7 | SLN |
| +044+ | 2.09 | Orel Hershiser | 97 | LAN |
| +043+ | 2.09 | Jose Rijo | 81.3 | CIN |
| +045+ | 2.01 | Todd Burns | 42.7 | OAK |
| +047+ | 2 | Chris Bosio | 90.3 | MIL |
| +050+ | 1.99 | Scott Garrelts | 83 | SFN |
| +052+ | 1.88 | Bob Welch | 89.7 | OAK |
| +053+ | 1.85 | Jose DeLeon | 100.3 | SLN |
_