| Team | Tm | Tier | Game |
|---|---|---|---|
| Colorado Rockies | COL | 2.95 | 199809050_SDN_COL |
| Houston Astros | HOU | 1.32 | 199809060_HOU_ARI |
| San Francisco Giants | SFN | 1.19 | 199809040_SFN_LAN |
| New York Yankees | NYA | 1.09 | 199809060_NYA_CHA |
| Pittsburgh Pirates | PIT | 0.78 | 199809060_CHN_PIT |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | -8.48 | 199809060_TBA_OAK |
| Seattle Mariners | SEA | -4.74 | 199809060_BAL_SEA |
| Kansas City Royals | KCA | -1.53 | 199809050_KCA_ANA |
| Chicago White Sox | CHA | -1.32 | 199809050_NYA_CHA |
| Detroit Tigers | DET | -1.24 | 199809060_CLE_DET |
Based on accumulated WAA for this season up to 1998-09-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +037+ | 5.38 | Robb Nen | 77.7 | SFN |
| +058+ | 4.5 | Ugueth Urbina | 59 | WAS |
| +067+ | 4.11 | Trevor Hoffman | 64.3 | SDN |
| +072+ | 4 | Jeff Shaw | 77 | TOT |
| +077+ | 3.74 | Albie Lopez | 70.7 | TBA |
| +079+ | 3.68 | Dennis Cook | 60.3 | NYN |
| +080+ | 3.62 | Mike Jackson | 58 | CLE |
| +086+ | 3.43 | John Wetteland | 55 | TEX |
| +085+ | 3.43 | Mariano Rivera | 54 | NYA |
| +088+ | 3.34 | Ramiro Mendoza | 118.7 | NYA |
| +089+ | 3.33 | Chuck McElroy | 62 | COL |
| +092+ | 3.25 | Shigetoshi Hasegawa | 90.3 | ANA |
| +098+ | 3.02 | Jason Christiansen | 60.3 | PIT |
| +099+ | 3.01 | Steve Reed | 77 | TOT |
| +102+ | 2.95 | Tom Gordon | 68.7 | BOS |
| +103+ | 2.95 | Terry Mulholland | 82.7 | CHN |
| +105+ | 2.9 | Paul Quantrill | 71.3 | TOR |
| +108+ | 2.84 | Juan Acevedo | 86 | SLN |
| +111+ | 2.78 | Donne Wall | 63.7 | SDN |
| +127+ | 2.52 | Mike DeJean | 74.3 | COL |
| +129+ | 2.46 | Ricardo Rincon | 59 | PIT |
| +128+ | 2.46 | John Hudek | 58.3 | TOT |
| +131+ | 2.45 | Billy Wagner | 50.7 | HOU |
| +135+ | 2.4 | Steve Kline | 67 | WAS |
| +136+ | 2.37 | Gregg Olson | 60.7 | ARI |
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