Umpire Grades
Every home-plate umpire we’ve graded, ranked by games worked. The grade is his accuracy on taken pitches against the rulebook zone; swing is the average runs his misses moved a game; ABS is his Automated Ball-Strike Systemrecord — how often the robots overruled him when a call was challenged. Each umpire’s page is a live rollup of his Blue Notes.
Behind the Plate
Season grade · 89 umps, 5+ gamesBest zones
- 1Dillon WilsonA95.8%
- 2Alex MacKayA95.3%
- 3Nestor CejaA95.2%
- 4Edwin MoscosoA95.1%
- 5Nate TomlinsonA95.1%
Roughest zones
- 1Malachi MooreB92.3%
- 2Bruce DreckmanB92.5%
- 3Jen PawolB92.6%
- 4Laz DiazB92.8%
- 5Carlos TorresB92.8%
Wildest zone this week — MIA @ MIL under Nick Mahrley, a 1.4-run swing toward MIA.
Tap a column to sort.
| Vic Carapazza | 21 | A-94.0% | 0.65 | 37/77 · 48.1% |
| Dan Iassogna | 20 | B+94.0% | 0.47 | 62/98 · 63.3% |
| Lance Barrett | 20 | B+93.5% | 0.45 | 58/100 · 58.0% |
| Mark Ripperger | 20 | A-94.7% | 0.47 | 36/83 · 43.4% |
| Nestor Ceja | 20 | A95.2% | 0.41 | 41/81 · 50.6% |
| Quinn Wolcott | 20 | A-94.2% | 0.64 | 37/79 · 46.8% |
| Adam Beck | 19 | B+93.5% | 0.51 | 40/85 · 47.1% |
| Adam Hamari | 19 | A-94.2% | 0.32 | 30/62 · 48.4% |
| Bill Miller | 19 | A-94.4% | 0.39 | 49/84 · 58.3% |
| Bruce Dreckman | 19 | B92.5% | 0.43 | 50/87 · 57.5% |
| David Rackley | 19 | B+93.8% | 0.36 | 32/72 · 44.4% |
| Edwin Moscoso | 19 | A95.1% | 0.61 | 38/78 · 48.7% |
| Hunter Wendelstedt | 19 | B+94.0% | 0.56 | 58/99 · 58.6% |
| Junior Valentine | 19 | A-94.6% | 0.52 | 41/75 · 54.7% |
| Laz Diaz | 19 | B92.8% | 0.52 | 53/91 · 58.2% |
| Malachi Moore | 19 | B92.3% | 0.55 | 56/95 · 58.9% |
| Mark Wegner | 19 | A-94.2% | 0.35 | 36/76 · 47.4% |
| Nic Lentz | 19 | B+93.8% | 0.59 | 32/79 · 40.5% |
| Paul Clemons | 19 | B+93.0% | 0.42 | 39/68 · 57.4% |
| Rob Drake | 19 | B+93.2% | 0.57 | 42/71 · 59.2% |
| Ryan Additon | 19 | B+93.3% | 0.57 | 47/97 · 48.5% |
| Will Little | 19 | A-94.9% | 0.39 | 33/77 · 42.9% |
| Willie Traynor | 19 | B+93.9% | 0.46 | 40/66 · 60.6% |
| Alan Porter | 18 | B+93.8% | 0.51 | 41/75 · 54.7% |
| Alex Tosi | 18 | A-94.5% | 0.45 | 27/62 · 43.5% |
| Chris Guccione | 18 | A-94.7% | 0.37 | 48/87 · 55.2% |
| Dan Bellino | 18 | B+93.6% | 0.43 | 47/78 · 60.3% |
| Dan Merzel | 18 | A-94.9% | 0.39 | 42/79 · 53.2% |
| Doug Eddings | 18 | A-94.0% | 0.46 | 41/73 · 56.2% |
| Erich Bacchus | 18 | B+93.6% | 0.58 | 24/58 · 41.4% |
| John Tumpane | 18 | A-94.7% | 0.54 | 40/76 · 52.6% |
| Jordan Baker | 18 | B+93.1% | 0.54 | 35/71 · 49.3% |
| Lance Barksdale | 18 | B+93.2% | 0.52 | 50/83 · 60.2% |
| Mike Estabrook | 18 | B+93.3% | 0.57 | 44/76 · 57.9% |
| Mike Muchlinski | 18 | B+94.0% | 0.36 | 38/68 · 55.9% |
| Nate Tomlinson | 18 | A95.1% | 0.45 | 31/62 · 50.0% |
| Ryan Blakney | 18 | B+93.3% | 0.47 | 38/73 · 52.1% |
| Ryan Wills | 18 | B+93.9% | 0.49 | 38/77 · 49.4% |
| Stu Scheurwater | 18 | B+93.3% | 0.49 | 51/80 · 63.7% |
| Tom Hanahan | 18 | B+93.5% | 0.50 | 35/71 · 49.3% |
| Tripp Gibson | 18 | A-94.6% | 0.37 | 32/64 · 50.0% |
| Alex MacKay | 17 | A95.3% | 0.47 | 47/77 · 61.0% |
| Alfonso Márquez | 17 | B+93.8% | 0.46 | 41/71 · 57.7% |
| Brennan Miller | 17 | B+93.6% | 0.59 | 34/64 · 53.1% |
| Carlos Torres | 17 | B92.8% | 0.53 | 30/59 · 50.8% |
| Chad Fairchild | 17 | B93.0% | 0.45 | 40/74 · 54.1% |
| Chad Whitson | 17 | B+94.0% | 0.49 | 40/69 · 58.0% |
| Chris Segal | 17 | B+93.9% | 0.41 | 52/82 · 63.4% |
| Clint Vondrak | 17 | B+93.7% | 0.56 | 33/59 · 55.9% |
| Gabe Morales | 17 | A-94.3% | 0.49 | 34/64 · 53.1% |
| James Hoye | 17 | B+93.4% | 0.52 | 35/74 · 47.3% |
| Jansen Visconti | 17 | A-94.5% | 0.40 | 31/67 · 46.3% |
| Jeremie Rehak | 17 | B+94.0% | 0.35 | 38/75 · 50.7% |
| John Libka | 17 | A-94.6% | 0.36 | 22/52 · 42.3% |
| Manny Gonzalez | 17 | B+93.5% | 0.40 | 48/79 · 60.8% |
| Roberto Ortiz | 17 | B+94.0% | 0.48 | 45/75 · 60.0% |
| Scott Barry | 17 | B+93.5% | 0.47 | 26/60 · 43.3% |
| Sean Barber | 17 | B92.9% | 0.67 | 43/80 · 53.7% |
| Todd Tichenor | 17 | B+93.1% | 0.48 | 43/65 · 66.2% |
| Ben May | 16 | A-94.4% | 0.36 | 30/56 · 53.6% |
| Brian Walsh | 16 | A-94.3% | 0.42 | 48/76 · 63.2% |
| Chris Conroy | 16 | B+93.8% | 0.79 | 29/62 · 46.8% |
| Cory Blaser | 16 | A-94.7% | 0.51 | 41/69 · 59.4% |
| D.J. Reyburn | 16 | B+94.0% | 0.43 | 35/70 · 50.0% |
| James Jean | 16 | B+93.9% | 0.35 | 23/55 · 41.8% |
| Jim Wolf | 16 | A-94.4% | 0.41 | 44/76 · 57.9% |
| Nick Mahrley | 16 | B+93.3% | 0.60 | 29/58 · 50.0% |
| Ramon De Jesus | 16 | A-94.1% | 0.60 | 45/79 · 57.0% |
| Shane Livensparger | 16 | A-94.0% | 0.44 | 29/64 · 45.3% |
| Emil Jimenez | 15 | B+93.1% | 0.58 | 23/58 · 39.7% |
| Austin Jones | 14 | A-94.9% | 0.35 | 25/56 · 44.6% |
| Marvin Hudson | 14 | A-94.1% | 0.49 | 28/48 · 58.3% |
| Brock Ballou | 13 | B+93.9% | 0.60 | 32/58 · 55.2% |
| Charlie Ramos | 13 | A-94.2% | 0.40 | 40/71 · 56.3% |
| Adrian Johnson | 12 | A-94.3% | 0.37 | 36/58 · 62.1% |
| Brian O'Nora | 12 | B92.9% | 0.51 | 30/55 · 54.5% |
| Derek Thomas | 12 | A-94.3% | 0.47 | 18/52 · 34.6% |
| Ron Kulpa | 12 | B+93.3% | 0.55 | 35/58 · 60.3% |
| Tyler Jones | 12 | A-94.5% | 0.72 | 26/52 · 50.0% |
| Andy Fletcher | 11 | B+93.5% | 0.73 | 38/52 · 73.1% |
| Jen Pawol | 11 | B92.6% | 0.51 | 32/56 · 57.1% |
| Dexter Kelley | 10 | B92.8% | 0.54 | 16/44 · 36.4% |
| Jacob Metz | 10 | B+93.8% | 0.30 | 31/51 · 60.8% |
| Steven Jaschinski | 10 | A-94.2% | 0.54 | 22/44 · 50.0% |
| John Bacon | 9 | B+93.4% | 0.57 | 30/48 · 62.5% |
| Edwin Jimenez | 8 | B+93.1% | 0.56 | 11/28 · 39.3% |
| Jonathan Parra | 8 | B+93.8% | 0.54 | 14/32 · 43.8% |
| Louie Krupa | 8 | A-94.4% | 0.72 | 13/37 · 35.1% |
| Dillon Wilson | 6 | A95.8% | 0.30 | 6/16 · 37.5% |
| Felix Neon | 4 | B92.6% | 0.54 | 17/27 · 63.0% |
| CB Bucknor | 2 | B+93.5% | 1.24 | 7/9 · 77.8% |