| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ed Whitson | SDN | 7.17 | 199009120_LAN_SDN |
| Chuck Finley | ANA | 6.09 | 199009130_SEA_ANA |
| Dave Stewart | OAK | 5.26 | 199009140_MIN_OAK |
| Danny Darwin | HOU | 5.16 | 199009120_HOU_CIN |
| Doug Drabek | PIT | 5.12 | 199009130_PIT_NYN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Walt Terrell | DET | -4.71 | 199009130_NYA_DET |
| Bruce Ruffin | PHI | -2.95 | 199009130_PHI_CHN |
| Derek Lilliquist | SDN | -1.98 | 199009140_SDN_ATL |
| Sergio Valdez | CLE | -1.59 | 199009140_CLE_KCA |
| Tom Glavine | ATL | -1.47 | 199009140_SDN_ATL |
Based on accumulated WAA for this season up to 1990-09-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 6.88 | Chuck Finley | 213 | ANA |
| +006+ | 6.83 | Ed Whitson | 211.7 | SDN |
| +009+ | 6.6 | Frank Viola | 214.3 | NYN |
| +010+ | 6.45 | Dave Stewart | 243 | OAK |
| +012+ | 6.18 | Danny Darwin | 145.3 | HOU |
| +018+ | 5.32 | Doug Drabek | 206 | PIT |
| +024+ | 4.75 | Norm Charlton | 133 | CIN |
| +037+ | 3.93 | Zane Smith | 185.3 | TOT |
| +039+ | 3.92 | Dave Stieb | 184 | TOR |
| +042+ | 3.76 | Kevin Appier | 160.7 | KCA |
| +045+ | 3.67 | Kirk McCaskill | 163 | ANA |
| +046+ | 3.53 | Oil Can Boyd | 174.3 | WAS |
| +050+ | 3.35 | Bob Welch | 208.3 | OAK |
| +054+ | 3.2 | Jose Rijo | 165 | CIN |
| +059+ | 3.11 | Ramon Martinez | 201.3 | LAN |
| +068+ | 2.8 | Bob Tewksbury | 129 | SLN |
| +070+ | 2.73 | Ben McDonald | 88.3 | BAL |
| +077+ | 2.54 | Dave Wells | 159.3 | TOR |
| +082+ | 2.45 | Greg Maddux | 208.7 | CHN |
| +085+ | 2.42 | Mike Morgan | 193.7 | LAN |
| +086+ | 2.41 | Charlie Leibrandt | 136.7 | ATL |
| +089+ | 2.38 | Bruce Hurst | 199.3 | SDN |
| +091+ | 2.35 | Mike Boddicker | 202.7 | BOS |
| +100+ | 2.22 | Randy Tomlin | 55 | PIT |
| +103+ | 2.18 | Bobby Witt | 196.7 | TEX |
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