| Team | Tm | Tier | Game |
|---|---|---|---|
| Houston Astros | HOU | 2.39 | 199809100_MIL_HOU |
| New York Yankees | NYA | 1.82 | 199809110_TOR_NYA |
| Los Angeles Dodgers | LAN | 1.33 | 199809120_LAN_SDN |
| Colorado Rockies | COL | 1.31 | 199809120_COL_SFN |
| Cleveland Indians | CLE | 0.88 | 199809120_CHA_CLE |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Kansas City Royals | KCA | -7.41 | 199809111_SEA_KCA |
| Seattle Mariners | SEA | -5.08 | 199809120_SEA_KCA |
| Anaheim Angels | ANA | -0.73 | 199809120_ANA_BAL |
| Cincinnati Reds | CIN | -0.66 | 199809110_ARI_CIN |
| Oakland Athletics | OAK | -0.59 | 199809120_OAK_MIN |
Based on accumulated WAA for this season up to 1998-09-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +037+ | 5.5 | Robb Nen | 80.7 | SFN |
| +056+ | 5 | Ugueth Urbina | 63.7 | WAS |
| +064+ | 4.46 | Trevor Hoffman | 67.7 | SDN |
| +069+ | 4.23 | Jeff Shaw | 79 | TOT |
| +077+ | 3.9 | Albie Lopez | 72 | TBA |
| +078+ | 3.88 | Dennis Cook | 62 | NYN |
| +079+ | 3.83 | Chuck McElroy | 66.7 | COL |
| +083+ | 3.72 | Mike Jackson | 59 | CLE |
| +086+ | 3.55 | John Wetteland | 56 | TEX |
| +087+ | 3.51 | Mariano Rivera | 56.7 | NYA |
| +089+ | 3.47 | Ramiro Mendoza | 121.7 | NYA |
| +090+ | 3.46 | Terry Mulholland | 87.3 | CHN |
| +096+ | 3.19 | Juan Acevedo | 89 | SLN |
| +097+ | 3.17 | Paul Quantrill | 74 | TOR |
| +100+ | 3.06 | Donne Wall | 66.3 | SDN |
| +101+ | 2.97 | Jason Christiansen | 61.7 | PIT |
| +102+ | 2.97 | Shigetoshi Hasegawa | 91.3 | ANA |
| +109+ | 2.79 | Tom Gordon | 71 | BOS |
| +111+ | 2.77 | Billy Wagner | 53.7 | HOU |
| +112+ | 2.76 | Steve Kline | 70.3 | WAS |
| +113+ | 2.71 | Kerry Ligtenberg | 68.3 | ATL |
| +114+ | 2.69 | Ricardo Rincon | 61 | PIT |
| +125+ | 2.59 | John Hudek | 59.3 | TOT |
| +127+ | 2.57 | Scott Radinsky | 61.3 | LAN |
| +134+ | 2.52 | Scott Service | 77 | KCA |
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