HOME PLATE UMPIRE
Nick Mahrley
Average zone
80% NRFI
5 games tracked
Career Averages
1.005
Zone Factor
16.8
K / Game
7.2
BB / Game
80%
NRFI Rate
Betting Implications
Average-sized zone (1.005x). No significant umpire-driven lean in either direction.
High NRFI rate (80%) suggests first innings are cleaner with Nick Mahrley behind the plate. Lean NRFI.
Season Breakdown
| Season | Games | Zone | K/G | BB/G | NRFI% | K Factor |
|---|---|---|---|---|---|---|
| 2026 | 5 | 1.005 | 16.8 | 7.2 | 80% | 1.003 |
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%.