Which home plate umpires' games lean toward the favorite covering the run line — and toward the over?
Tom Hallion leads the ATS board at 58.3% favorite covers, while James Jean leads the Over/Under board at 59.1%.
Favorite Cover % and Over % are computed across every lined game a home plate umpire worked, among umpires with at least 25 qualifying games. Base umpires aren't included — they don't call balls and strikes, so there's no comparable betting-bias read for those positions.
| # | Umpire | Games | Favorite Cover % |
|---|---|---|---|
| 1 | Tom Hallion | 36 | 58.3% |
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| # | Umpire | Games | Over % |
|---|---|---|---|
| 1 | James Jean | 44 | 59.1% |
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