HOME PLATE UMPIRE
Brian O'Nora
Wide zone
43% NRFI
7 games tracked
Career Averages
1.117
Zone Factor
19.7
K / Game
6.9
BB / Game
43%
NRFI Rate
Betting Implications
Wide zone (1.117x) means pitchers get more borderline calls. This boosts strikeout props and suppresses walks.
K factor of 1.177 means games called by Brian O'Nora produce 18% more strikeouts than league average. Consider bumping K over confidence.
Season Breakdown
| Season | Games | Zone | K/G | BB/G | NRFI% | K Factor |
|---|---|---|---|---|---|---|
| 2026 | 7 | 1.117 | 19.7 | 6.9 | 43% | 1.177 |
Factor Definitions
Zone Size Factor: Strike zone width relative to league average (1.000). Higher = wider zone, favoring pitchers.
K Factor: Strikeout rate in this umpire's games vs league average. Higher = more Ks.
BB Factor: Walk rate adjustment. Higher = fewer walks (wider zone suppresses walks).
NRFI Rate: % of games with no runs in the first inning. League average is roughly 55%.