HOME PLATE UMPIRE
John Libka
Wide zone
57% NRFI
7 games tracked
Career Averages
1.103
Zone Factor
15.7
K / Game
5.7
BB / Game
57%
NRFI Rate
Betting Implications
Wide zone (1.103x) means pitchers get more borderline calls. This boosts strikeout props and suppresses walks.
K factor of 0.938 means 6% fewer strikeouts than average. Be cautious with K over plays.
Season Breakdown
| Season | Games | Zone | K/G | BB/G | NRFI% | K Factor |
|---|---|---|---|---|---|---|
| 2026 | 7 | 1.103 | 15.7 | 5.7 | 57% | 0.938 |
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%.