Is Adrian Johnson a hitter's or pitcher's umpire?

With Adrian Johnson behind the plate, MLB games average 10.21 total runs versus a league average of 9.02, a run factor of 1.13. That makes him a hitter's umpire, one of the most run-friendly zones in the league.

How is an umpire's run factor measured?

From 89 games with Adrian Johnson behind the plate in our database, rebuilt nightly. A run factor of 1.00 is league average; above means more scoring in his games, below means less.

Pick Board Playoff Odds Answers

Team Stats Over/Under & YRFI Run Line Form & Streaks Ballparks Umpires Bullpens

MLB · Umpire Tendencies

Adrian Johnson

With Adrian Johnson behind the plate, MLB games average 10.21 total runs versus a league average of 9.02. That is a run factor of 1.13, #4 of 96 umpires for scoring, making him a hitter's umpire, one of the most run-friendly zones in the league.

Run factor

1.13

+13%

runs vs average

Strikeout factor

0.96

-4%

strikeouts vs average

Games

behind the plate, in our data

A strikeout factor of 0.96 (-4%) reflects how wide or tight Adrian Johnson calls the zone. A wider zone means more called strikes, more strikeouts, and fewer baserunners, which is why umpire run and strikeout factors usually move together. The home team wins 55.1% of his games, close to the league's modest home rate.

How we counted

From 89 games with Adrian Johnson as home-plate umpire, rebuilt nightly. Factors are normalized so 1.00 equals the league-average umpire. A single umpire is a small slice of the season, so read the extremes as tendencies, not certainties. Descriptive, not a prediction.

Last recomputed August 23, 2026.

Compare umpires

Andy Fletcher 1.25 Louie Krupa 1.21 Jen Pawol 1.15 Jacob Metz 0.87

All umpire tendencies → Does weather affect scoring? →

📊 Like this? Get the monthly AI report plus the daily email, free.