| Team | Tm | Tier | Game |
|---|---|---|---|
| Toronto Blue Jays | TOR | 3.53 | 199105190_TOR_CHA |
| Montreal Expos | WAS | 2.8 | 199105190_WAS_SFN |
| Los Angeles Dodgers | LAN | 2.42 | 199105180_NYN_LAN |
| Kansas City Royals | KCA | 1.11 | 199105180_MIL_KCA |
| Pittsburgh Pirates | PIT | 1.07 | 199105190_PIT_ATL |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Houston Astros | HOU | -6.07 | 199105190_HOU_SLN |
| Boston Red Sox | BOS | -3.28 | 199105200_MIL_BOS |
| San Diego Padres | SDN | -3.2 | 199105180_SDN_CIN |
| Baltimore Orioles | BAL | -1.46 | 199105200_BAL_DET |
| Oakland Athletics | OAK | -1.04 | 199105190_OAK_CLE |
Based on accumulated WAA for this season up to 1991-05-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +019+ | 1.95 | Roger McDowell | 30.3 | PHI |
| +021+ | 1.83 | Mark Eichhorn | 23 | ANA |
| +034+ | 1.47 | Russ Swan | 24 | SEA |
| +043+ | 1.35 | Paul Gibson | 29.7 | DET |
| +044+ | 1.33 | Bryan Harvey | 17.3 | ANA |
| +046+ | 1.27 | Donn Pall | 17.7 | CHA |
| +049+ | 1.26 | Michael Jackson | 26.3 | SEA |
| XXXXX | 1.24 | Bill Landrum | 18.7 | PIT |
| XXXXX | 1.21 | Darren Holmes | 29.3 | MIL |
| XXXXX | 1.21 | Scott Terry | 20.7 | SLN |
| XXXXX | 1.2 | Jeff Robinson | 23 | ANA |
| XXXXX | 1.16 | Jeff Gray | 25 | BOS |
| XXXXX | 1.12 | Mike Henneman | 24.7 | DET |
| XXXXX | 1.12 | Bill Swift | 20 | SEA |
| XXXXX | 1.11 | Rob Dibble | 19.7 | CIN |
| XXXXX | 1.11 | Juan Berenguer | 24.7 | ATL |
| XXXXX | 1.11 | Randy Tomlin | 29 | PIT |
| XXXXX | 1.1 | Duane Ward | 22 | TOR |
| XXXXX | 1.08 | Alejandro Pena | 14.7 | NYN |
| XXXXX | 1.07 | Jeff Russell | 19.3 | TEX |
| XXXXX | 0.98 | Kent Mercker | 18.3 | ATL |
| XXXXX | 0.94 | John Franco | 13 | NYN |
| XXXXX | 0.89 | Scott Ruskin | 17.7 | WAS |
| XXXXX | 0.86 | Rick Aguilera | 16.7 | MIN |
| XXXXX | 0.86 | Jim Clancy | 24 | HOU |
_