MLB OFFICIALS
Umpire Profiles
Home plate umpire tendencies that matter for betting. Strike zone size, K and walk rates, and first-inning scoring patterns.
0 profiled today
77 profiled umpires
15 umpires assigned today have no historical profile — those games appear in the slate without trend data.
Today's Home Plate Umpires
Assigned home plate umpires for today's games with zone tendency and betting-relevant stats.
Colorado Rockies @ Detroit Tigers 12:10 PM ET
No historical profile yet. Data builds as the season progresses.
Los Angeles Angels @ Washington Nationals 1:35 PM ET
No historical profile yet. Data builds as the season progresses.
Philadelphia Phillies @ Atlanta Braves 1:35 PM ET
No historical profile yet. Data builds as the season progresses.
New York Mets @ New York Yankees 1:35 PM ET
No historical profile yet. Data builds as the season progresses.
Baltimore Orioles @ Toronto Blue Jays 1:37 PM ET
No historical profile yet. Data builds as the season progresses.
Houston Astros @ Tampa Bay Rays 1:40 PM ET
No historical profile yet. Data builds as the season progresses.
Los Angeles Dodgers @ Miami Marlins 1:40 PM ET
No historical profile yet. Data builds as the season progresses.
Cleveland Guardians @ Minnesota Twins 2:10 PM ET
No historical profile yet. Data builds as the season progresses.
Cincinnati Reds @ Milwaukee Brewers 2:10 PM ET
No historical profile yet. Data builds as the season progresses.
Chicago White Sox @ St. Louis Cardinals 2:15 PM ET
No historical profile yet. Data builds as the season progresses.
Pittsburgh Pirates @ Chicago Cubs 2:20 PM ET
No historical profile yet. Data builds as the season progresses.
Kansas City Royals @ Boston Red Sox 3:05 PM ET
No historical profile yet. Data builds as the season progresses.
Seattle Mariners @ Athletics 4:05 PM ET
No historical profile yet. Data builds as the season progresses.
Texas Rangers @ Arizona Diamondbacks 4:10 PM ET
No historical profile yet. Data builds as the season progresses.
San Diego Padres @ San Francisco Giants 7:20 PM ET
No historical profile yet. Data builds as the season progresses.
Umpire Directory
All profiled umpires sorted by strike zone size. Wider zones favor pitchers and strikeout props.
| Umpire | Zone | K/G | BB/G | NRFI% | K Factor | Games | Seasons |
|---|---|---|---|---|---|---|---|
| John Bacon | 1.395 Wide | 16.4 | 4 | 40% | 0.979 | 5 | 2026 |
| Paul Clemons | 1.248 Wide | 14.8 | 4.5 | 33% | 0.885 | 6 | 2026 |
| Chris Segal | 1.233 Wide | 15.6 | 4.7 | 43% | 0.929 | 7 | 2026 |
| Jansen Visconti | 1.209 Wide | 17 | 5.2 | 17% | 1.014 | 6 | 2026 |
| Ryan Blakney | 1.201 Wide | 17.3 | 5.3 | 43% | 1.032 | 7 | 2026 |
| D.J. Reyburn | 1.192 Wide | 17.6 | 5.4 | 43% | 1.049 | 7 | 2026 |
| Cory Blaser | 1.184 Wide | 17.2 | 5.4 | 60% | 1.026 | 5 | 2026 |
| Clint Vondrak | 1.184 Wide | 16.2 | 5.2 | 50% | 0.965 | 6 | 2026 |
| Ryan Wills | 1.154 Wide | 19.5 | 6.3 | 50% | 1.164 | 6 | 2026 |
| Brian Walsh | 1.137 Wide | 16.7 | 5.7 | 83% | 0.995 | 6 | 2026 |
| Alfonso Márquez | 1.137 Wide | 16.5 | 5.6 | 13% | 0.985 | 8 | 2026 |
| John Tumpane | 1.133 Wide | 16.7 | 5.7 | 57% | 0.998 | 7 | 2026 |
| Bill Miller | 1.123 Wide | 20.6 | 7.1 | 56% | 1.227 | 9 | 2026 |
| Quinn Wolcott | 1.123 Wide | 20.9 | 7.2 | 63% | 1.246 | 8 | 2026 |
| Brian O'Nora | 1.117 Wide | 19.7 | 6.9 | 43% | 1.177 | 7 | 2026 |
| Bruce Dreckman | 1.113 Wide | 18.6 | 6.5 | 50% | 1.111 | 8 | 2026 |
| Alan Porter | 1.105 Wide | 16.3 | 5.9 | 57% | 0.972 | 7 | 2026 |
| John Libka | 1.103 Wide | 15.7 | 5.7 | 57% | 0.938 | 7 | 2026 |
| Carlos Torres | 1.095 Slightly wide | 18 | 6.5 | 50% | 1.074 | 8 | 2026 |
| Mike Muchlinski | 1.087 Slightly wide | 17.4 | 6.4 | 38% | 1.037 | 8 | 2026 |
| Ryan Additon | 1.080 Slightly wide | 21.3 | 8.1 | 71% | 1.270 | 7 | 2026 |
| Dan Merzel | 1.075 Slightly wide | 16.8 | 6.3 | 67% | 1.005 | 6 | 2026 |
| Jordan Baker | 1.063 Slightly wide | 15.9 | 6.1 | 43% | 0.946 | 7 | 2026 |
| Marvin Hudson | 1.062 Slightly wide | 14.9 | 5.9 | 71% | 0.887 | 7 | 2026 |
| Hunter Wendelstedt | 1.057 Slightly wide | 16.8 | 6.5 | 50% | 1.000 | 8 | 2026 |
| Scott Barry | 1.053 Slightly wide | 18.3 | 7.1 | 86% | 1.091 | 7 | 2026 |
| Todd Tichenor | 1.046 Slightly wide | 14.4 | 5.9 | 13% | 0.858 | 8 | 2026 |
| Stu Scheurwater | 1.045 Slightly wide | 19.2 | 7.7 | 17% | 1.144 | 6 | 2026 |
| Mike Estabrook | 1.039 Slightly wide | 16.5 | 6.6 | 50% | 0.985 | 8 | 2026 |
| Rob Drake | 1.038 Slightly wide | 17.1 | 6.9 | 63% | 1.022 | 8 | 2026 |
| Lance Barrett | 1.037 Slightly wide | 16.2 | 6.6 | 67% | 0.968 | 9 | 2026 |
| Adam Hamari | 1.030 Slightly wide | 14.3 | 6 | 43% | 0.853 | 7 | 2026 |
| Lance Barksdale | 1.020 Average | 18.1 | 7.6 | 29% | 1.083 | 7 | 2026 |
| Adrian Johnson | 1.017 Average | 20.3 | 8.8 | 33% | 1.214 | 6 | 2026 |
| David Rackley | 1.010 Average | 16.9 | 7.1 | 43% | 1.006 | 7 | 2026 |
| Nate Tomlinson | 1.010 Average | 16.9 | 7.1 | 43% | 1.006 | 7 | 2026 |
| Roberto Ortiz | 1.009 Average | 17.1 | 7.3 | 29% | 1.023 | 7 | 2026 |
| Jeremie Rehak | 1.005 Average | 16.8 | 7.2 | 20% | 1.003 | 5 | 2026 |
| Nick Mahrley | 1.005 Average | 16.8 | 7.2 | 80% | 1.003 | 5 | 2026 |
| Nestor Ceja | 1.001 Average | 14.5 | 6.4 | 63% | 0.865 | 8 | 2026 |
| James Hoye | 0.998 Average | 16.4 | 7.1 | 43% | 0.980 | 7 | 2026 |
| Dan Iassogna | 0.997 Average | 18 | 7.9 | 50% | 1.074 | 8 | 2026 |
| Mark Wegner | 0.995 Average | 18.6 | 8.2 | 38% | 1.111 | 8 | 2026 |
| Tripp Gibson | 0.991 Average | 19.1 | 8.6 | 50% | 1.141 | 8 | 2026 |
| Erich Bacchus | 0.990 Average | 17.1 | 7.6 | 57% | 1.023 | 7 | 2026 |
| Alex MacKay | 0.986 Average | 18.2 | 8.2 | 33% | 1.084 | 6 | 2026 |
| Brennan Miller | 0.973 Average | 17.1 | 7.9 | 57% | 1.023 | 7 | 2026 |
| James Jean | 0.966 Slightly tight | 13.4 | 6.4 | 40% | 0.800 | 5 | 2026 |
| Dan Bellino | 0.963 Slightly tight | 14.6 | 6.9 | 57% | 0.870 | 7 | 2026 |
| Shane Livensparger | 0.962 Slightly tight | 15.6 | 7.3 | 57% | 0.929 | 7 | 2026 |
| Mark Ripperger | 0.960 Slightly tight | 17 | 8 | 43% | 1.014 | 7 | 2026 |
| Manny Gonzalez | 0.960 Slightly tight | 16.7 | 7.9 | 57% | 0.998 | 7 | 2026 |
| Chris Conroy | 0.950 Slightly tight | 17.8 | 8.7 | 33% | 1.064 | 6 | 2026 |
| Edwin Moscoso | 0.949 Slightly tight | 17.9 | 8.7 | 71% | 1.066 | 7 | 2026 |
| Chad Whitson | 0.948 Slightly tight | 15.4 | 7.4 | 57% | 0.921 | 7 | 2026 |
| Junior Valentine | 0.946 Slightly tight | 16.8 | 8.2 | 50% | 1.005 | 6 | 2026 |
| Alex Tosi | 0.945 Slightly tight | 15 | 7.3 | 43% | 0.895 | 7 | 2026 |
| Doug Eddings | 0.934 Slightly tight | 15.6 | 7.7 | 57% | 0.929 | 7 | 2026 |
| Charlie Ramos | 0.930 Slightly tight | 15.7 | 7.9 | 43% | 0.938 | 7 | 2026 |
| Laz Diaz | 0.927 Slightly tight | 17 | 8.6 | 75% | 1.014 | 8 | 2026 |
| Malachi Moore | 0.927 Slightly tight | 15.4 | 7.8 | 33% | 0.922 | 9 | 2026 |
| Chris Guccione | 0.926 Slightly tight | 15 | 7.6 | 43% | 0.895 | 7 | 2026 |
| Adam Beck | 0.926 Slightly tight | 15.9 | 8 | 43% | 0.946 | 7 | 2026 |
| Andy Fletcher | 0.922 Slightly tight | 15.1 | 7.7 | 71% | 0.904 | 7 | 2026 |
| Nic Lentz | 0.918 Slightly tight | 17.6 | 9.2 | 50% | 1.052 | 8 | 2026 |
| Chad Fairchild | 0.914 Slightly tight | 12.1 | 6.6 | 57% | 0.725 | 7 | 2026 |
| Willie Traynor | 0.913 Slightly tight | 17.7 | 9.4 | 43% | 1.057 | 7 | 2026 |
| Gabe Morales | 0.905 Slightly tight | 15.1 | 8 | 57% | 0.904 | 7 | 2026 |
| Derek Thomas | 0.903 Slightly tight | 18.6 | 10.4 | 40% | 1.110 | 5 | 2026 |
| Will Little | 0.901 Slightly tight | 16.9 | 9.1 | 38% | 1.007 | 8 | 2026 |
| Ben May | 0.879 Tight | 18 | 10.6 | 40% | 1.074 | 5 | 2026 |
| Brock Ballou | 0.872 Tight | 14.4 | 8.2 | 60% | 0.859 | 5 | 2026 |
| Sean Barber | 0.863 Tight | 16.4 | 9.7 | 71% | 0.980 | 7 | 2026 |
| Jim Wolf | 0.853 Tight | 13.4 | 8 | 40% | 0.800 | 5 | 2026 |
| Tom Hanahan | 0.849 Tight | 14.3 | 8.6 | 29% | 0.853 | 7 | 2026 |
| Vic Carapazza | 0.844 Tight | 13.9 | 8.4 | 44% | 0.829 | 9 | 2026 |
| Austin Jones | 0.840 Tight | 16 | 10 | 80% | 0.955 | 5 | 2026 |
How to Read This
Zone Size Factor
Measures how wide or tight an umpire's strike zone is relative to league average (1.000). Above 1.03 means a wider zone that favors pitchers and boosts strikeouts. Below 0.97 means a tighter zone that favors hitters and increases walks.
NRFI Rate
Percentage of this umpire's games where neither team scores in the first inning. Higher rates suggest a zone that suppresses early offense. League average is roughly 55%.
K Factor
Strikeout rate in this umpire's games vs league average. Above 1.0 means more Ks per game than normal, relevant for strikeout prop bets.
Sample Size
Umpire profiles require at least 10 sampled games to appear. Profiles strengthen as more data accumulates throughout the season.