| Team | Tm | Tier | Game |
|---|---|---|---|
| Colorado Rockies | COL | 1.87 | 199809030_COL_MIL |
| Los Angeles Dodgers | LAN | 1.72 | 199809010_PHI_LAN |
| Montreal Expos | WAS | 1.34 | 199809010_WAS_SFN |
| San Francisco Giants | SFN | 1.34 | 199809010_WAS_SFN |
| Boston Red Sox | BOS | 1.12 | 199809010_SEA_BOS |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Detroit Tigers | DET | -6.25 | 199809020_TEX_DET |
| Florida Marlins | MIA | -5.81 | 199809010_SLN_MIA |
| Oakland Athletics | OAK | -4.72 | 199809010_OAK_NYA |
| Seattle Mariners | SEA | -2.1 | 199809010_SEA_BOS |
| St. Louis Cardinals | SLN | -1.26 | 199809010_SLN_MIA |
Based on accumulated WAA for this season up to 1998-09-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +037+ | 5.28 | Robb Nen | 76.7 | SFN |
| +057+ | 4.41 | Ugueth Urbina | 58 | WAS |
| +066+ | 4.01 | Trevor Hoffman | 63.3 | SDN |
| +068+ | 3.98 | Jeff Shaw | 76.7 | TOT |
| +076+ | 3.66 | Dennis Cook | 60 | NYN |
| +077+ | 3.64 | Albie Lopez | 69.7 | TBA |
| +082+ | 3.55 | Mariano Rivera | 53 | NYA |
| +083+ | 3.53 | Mike Jackson | 57 | CLE |
| +086+ | 3.41 | John Wetteland | 54.7 | TEX |
| +088+ | 3.35 | Chuck McElroy | 62 | COL |
| +095+ | 3.14 | Jason Christiansen | 59.3 | PIT |
| +098+ | 3.07 | Shigetoshi Hasegawa | 88.3 | ANA |
| +099+ | 3.05 | Ramiro Mendoza | 113.7 | NYA |
| +100+ | 3.02 | Steve Reed | 77 | TOT |
| +101+ | 2.99 | Paul Quantrill | 70 | TOR |
| +102+ | 2.96 | Tom Gordon | 68.7 | BOS |
| +107+ | 2.93 | John Hudek | 56.7 | TOT |
| +114+ | 2.74 | Terry Mulholland | 78.3 | CHN |
| +120+ | 2.68 | Donne Wall | 62.7 | SDN |
| +122+ | 2.66 | Juan Acevedo | 84 | SLN |
| +127+ | 2.54 | Mike DeJean | 74.3 | COL |
| +133+ | 2.43 | Xavier Hernandez | 53.3 | TEX |
| +138+ | 2.38 | Ricardo Rincon | 58 | PIT |
| +141+ | 2.33 | Graeme Lloyd | 33 | NYA |
| +142+ | 2.31 | Kerry Ligtenberg | 64.7 | ATL |
_