Conor Tierney

← All umpires (2026)

3
Games
478
Called Pitches
89.12%
Accuracy
65.09%
Consistency (106 shadow-zone)
-1.23
Favor (Home, runs)

Consistency is accuracy on "shadow zone" pitches only — the genuinely borderline calls near the edge of the zone. Favor is the net run-value impact (site's own pitch-level run-expectancy model) of this umpire's missed calls toward home teams across their games this season; positive favors the home team, negative favors visitors.

Accuracy trend (2026-06-21 – 2026-07-10)
90.73% 87.71%
Season Miss-Rate Heatmap

Miss rate by pitch location across every game this umpire worked in 2026, normalized to each batter's own strike zone (0 = bottom of their zone, 1 = top).

0/11 missed (0%) 2/14 missed (14%) 3/14 missed (21%) 1/13 missed (8%) 2/10 missed (20%) 0/9 missed (0%) 2/16 missed (12%) 0/14 missed (0%) 0/3 missed (0%) 2/11 missed (18%) 0/13 missed (0%) 0/5 missed (0%) 0/3 missed (0%) 0/10 missed (0%) 0/11 missed (0%) 7/11 missed (64%) 1/17 missed (6%) 8/17 missed (47%) 0/5 missed (0%) 3/14 missed (21%) 0/18 missed (0%) 0/11 missed (0%) 2/6 missed (33%) 3/10 missed (30%) 4/7 missed (57%) 1/12 missed (8%) 3/10 missed (30%) 0/6 missed (0%) 0/9 missed (0%) 0/12 missed (0%) 0/11 missed (0%) 0/4 missed (0%) 1/7 missed (14%) 0/8 missed (0%) 0/6 missed (0%) 0/6 missed (0%) 1/15 missed (7%) 1/2 missed (50%) 0/5 missed (0%) 2/10 missed (20%) 0/2 missed (0%) 1/11 missed (9%) 1/7 missed (14%) 0/3 missed (0%) 0/2 missed (0%) 0/17 missed (0%) 0/2 missed (0%) 0/3 missed (0%) 0/4 missed (0%) 0/11 missed (0%) 0/2 missed (0%) 0/2 missed (0%) 0/4 missed (0%) 1/7 missed (14%)
Miss rate: 0% 100%
Game Log
Date Matchup Called Pitches Correct Accuracy% Missed Strikes Missed Balls Graced Consistency% Favor (Home) Zone Chart
2026-06-21 Cotuit Kettleers @ Orleans Firebirds 151 137 90.73% 4 10 9 76.92% -1.44 View →
2026-06-26 Brewster Whitecaps @ Bourne Braves 148 132 89.19% 3 13 10 58.62% +0.38 View →
2026-07-10 Brewster Whitecaps @ Chatham Anglers 179 157 87.71% 5 17 16 57.89% -0.17 View →