| Team | Tm | Tier | Game |
|---|---|---|---|
| Colorado Rockies | COL | 2.95 | 199809050_SDN_COL |
| San Francisco Giants | SFN | 1.19 | 199809040_SFN_LAN |
| Houston Astros | HOU | 0.93 | 199809050_HOU_ARI |
| New York Yankees | NYA | 0.71 | 199809050_NYA_CHA |
| Tampa Bay Devil Rays | TBA | 0.69 | 199809050_TBA_OAK |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | -8.34 | 199809040_TBA_OAK |
| Detroit Tigers | DET | -6.04 | 199809030_CLE_DET |
| Seattle Mariners | SEA | -4.34 | 199809040_BAL_SEA |
| Kansas City Royals | KCA | -1.53 | 199809050_KCA_ANA |
| Chicago White Sox | CHA | -1.32 | 199809050_NYA_CHA |
Based on accumulated WAA for this season up to 1998-09-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +040+ | 5.28 | Robb Nen | 76.7 | SFN |
| +057+ | 4.5 | Ugueth Urbina | 59 | WAS |
| +064+ | 4.11 | Trevor Hoffman | 64.3 | SDN |
| +069+ | 4 | Jeff Shaw | 77 | TOT |
| +078+ | 3.65 | Dennis Cook | 60 | NYN |
| +079+ | 3.64 | Albie Lopez | 69.7 | TBA |
| +080+ | 3.62 | Mike Jackson | 58 | CLE |
| +084+ | 3.44 | John Wetteland | 55 | TEX |
| +085+ | 3.43 | Mariano Rivera | 54 | NYA |
| +088+ | 3.33 | Chuck McElroy | 62 | COL |
| +094+ | 3.16 | Shigetoshi Hasegawa | 89.3 | ANA |
| +096+ | 3.05 | Paul Quantrill | 70.7 | TOR |
| +098+ | 3.02 | Steve Reed | 77 | TOT |
| +100+ | 2.99 | John Hudek | 57.3 | TOT |
| +101+ | 2.95 | Tom Gordon | 68.7 | BOS |
| +103+ | 2.92 | Jason Christiansen | 59.3 | PIT |
| +108+ | 2.86 | Ramiro Mendoza | 114 | NYA |
| +112+ | 2.73 | Terry Mulholland | 78.3 | CHN |
| +118+ | 2.67 | Donne Wall | 62.7 | SDN |
| +121+ | 2.65 | Juan Acevedo | 84 | SLN |
| +126+ | 2.52 | Mike DeJean | 74.3 | COL |
| +130+ | 2.47 | Ricardo Rincon | 59 | PIT |
| +132+ | 2.46 | Billy Wagner | 50.7 | HOU |
| +134+ | 2.4 | Steve Kline | 67 | WAS |
| +135+ | 2.38 | Gregg Olson | 60.7 | ARI |
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