| Team | Tm | Tier | Game |
|---|---|---|---|
| San Francisco Giants | SFN | 2.03 | 199809210_PIT_SFN |
| New York Yankees | NYA | 1.85 | 199809221_CLE_NYA |
| Houston Astros | HOU | 1.78 | 199809230_HOU_SLN |
| Boston Red Sox | BOS | 1.74 | 199809230_TBA_BOS |
| Colorado Rockies | COL | 1.5 | 199809220_ARI_COL |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Kansas City Royals | KCA | -5.25 | 199809210_DET_KCA |
| Anaheim Angels | ANA | -3.81 | 199809210_TEX_ANA |
| Detroit Tigers | DET | -2.95 | 199809220_DET_KCA |
| Oakland Athletics | OAK | -2.73 | 199809210_OAK_SEA |
| Chicago Cubs | CHN | -2.61 | 199809220_CHN_MIL |
Based on accumulated WAA for this season up to 1998-09-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +038+ | 5.87 | Robb Nen | 86.7 | SFN |
| +058+ | 5.05 | Ugueth Urbina | 68.3 | WAS |
| +068+ | 4.66 | Trevor Hoffman | 72 | SDN |
| +072+ | 4.5 | Jeff Shaw | 82 | TOT |
| +078+ | 4.13 | Mike Jackson | 63 | CLE |
| +081+ | 3.92 | Dennis Cook | 67 | NYN |
| +084+ | 3.82 | Juan Acevedo | 95.3 | SLN |
| +087+ | 3.64 | John Wetteland | 61 | TEX |
| +089+ | 3.61 | Mariano Rivera | 59.7 | NYA |
| +090+ | 3.58 | Albie Lopez | 77.3 | TBA |
| +092+ | 3.41 | Ramiro Mendoza | 129.3 | NYA |
| +100+ | 3.23 | Tom Gordon | 77.3 | BOS |
| +103+ | 3.13 | Donne Wall | 69.3 | SDN |
| +108+ | 3.05 | Paul Quantrill | 79 | TOR |
| +109+ | 3.01 | Kerry Ligtenberg | 71.3 | ATL |
| +114+ | 2.88 | Jason Christiansen | 64.7 | PIT |
| +116+ | 2.78 | Jim Corsi | 65 | BOS |
| +119+ | 2.73 | Mike Williams | 51 | PIT |
| +120+ | 2.72 | Dave Veres | 74.3 | COL |
| +121+ | 2.72 | Mike Timlin | 78.3 | SEA |
| +122+ | 2.7 | Sean Bergman | 171 | HOU |
| +130+ | 2.53 | Turk Wendell | 74 | NYN |
| +134+ | 2.49 | Rodney Beck | 76 | CHN |
| +135+ | 2.48 | Shigetoshi Hasegawa | 97 | ANA |
| +137+ | 2.47 | Doug Brocail | 60.3 | DET |
_