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Umpires
Per-umpire accuracy and ABS challenge stats
2026
▼
Regular Season
▼
Accuracy
Challenges
Impact
Call Context
#
Umpire
Called
Total Called Pitches
Correct
Correct Calls
Missed
Incorrect Calls
Acc%
Overall Accuracy (Correct / Total)
Avg Miss (in.)
Avg Distance to Zone Edge on Incorrect Calls (inches)
Bad S
Incorrect Called Strikes (ball called strike)
Bad B
Incorrect Balls (strike called ball)
xAcc%
Expected accuracy: the accuracy an average umpire would have on this umpire's exact pitch mix, based on pitch location difficulty.
AOE
▲
Accuracy over expected: actual accuracy minus expected accuracy. Positive means the umpire is more accurate than average on their pitch mix.
Chall
ABS Challenges Faced
OT
Challenges Overturned
OT%
Overturn Rate
xChall
Expected Challenges Faced (sum of xChall% across all called pitches)
COE
Challenges Over Expected (actual challenges − expected challenges)
COE/P
Challenges Over Expected per Called Pitch
OT RE
Total RE Given Up on Overturned Challenges
OT WPA
Total WPA Given Up on Overturned Challenges
Upheld Cost RE
Total RE Cost to Teams on Upheld Challenges
Upheld Cost WPA
Total WPA Cost to Teams on Upheld Challenges
Call LI
Avg Call Leverage Index on Challenged Pitches
xChall%
Avg Expected Challenge % on Challenged Pitches
cBE%
Avg Challenge Breakeven %
acBE%
Avg Adjusted Challenge Breakeven % (timing-adjusted)
1
Ron Kulpa
241
210
31
87.1%
1.38
18
13
92.9%
-5.8%
9
7
77.8%
9.44
-0.44
-0.0018
1.139
0.086
0.063
0.005
1.35
30.3%
48.7%
18.9%
2
CB Bucknor
231
204
27
88.3%
1.36
17
10
92.0%
-3.7%
8
6
75.0%
4.59
+3.41
+0.0148
2.131
0.127
0.157
0.011
1.41
20.9%
45.5%
7.8%
3
Chris Segal
416
371
45
89.2%
0.95
28
17
92.3%
-3.1%
17
14
82.4%
11.23
+5.77
+0.0139
3.856
0.532
0.119
0.012
3.54
25.0%
46.2%
13.3%
4
Alex MacKay
136
121
15
89.0%
0.99
6
9
90.7%
-1.7%
2
1
50.0%
4.40
-2.40
-0.0176
0.124
0.024
0.039
0.004
2.33
29.3%
44.6%
20.0%
5
Paul Clemons
260
233
27
89.6%
0.94
17
10
90.9%
-1.3%
9
7
77.8%
7.56
+1.44
+0.0056
1.018
0.167
0.049
0.006
1.51
20.3%
57.5%
19.2%
6
Dan Iassogna
634
576
58
90.8%
1.08
37
21
91.9%
-1.1%
17
11
64.7%
16.59
+0.41
+0.0006
2.196
0.211
0.119
0.012
1.39
19.5%
49.6%
12.6%
7
Shane Livensparger
296
272
24
91.9%
1.37
10
14
92.9%
-1.0%
6
2
33.3%
6.73
-0.73
-0.0025
0.666
0.058
0.133
0.006
0.85
17.0%
47.9%
11.8%
8
James Jean
160
148
12
92.5%
1.10
6
6
93.4%
-0.9%
3
1
33.3%
3.87
-0.87
-0.0054
0.124
0.012
0.046
0.003
0.46
21.4%
59.4%
16.1%
9
Dan Bellino
429
395
34
92.1%
1.14
19
15
92.7%
-0.6%
15
10
66.7%
11.63
+3.37
+0.0079
1.563
0.177
0.108
0.010
1.17
20.5%
59.7%
23.0%
10
Andy Fletcher
458
419
39
91.5%
1.11
21
18
92.1%
-0.6%
17
15
88.2%
12.93
+4.07
+0.0089
3.839
0.243
0.065
0.006
1.11
26.1%
47.7%
14.2%
11
Laz Diaz
397
370
27
93.2%
1.41
17
10
93.6%
-0.4%
15
9
60.0%
8.24
+6.76
+0.0170
1.384
0.152
0.226
0.020
1.32
19.4%
51.7%
16.9%
12
Nic Lentz
526
481
45
91.4%
1.19
22
23
91.8%
-0.3%
23
12
52.2%
10.38
+12.62
+0.0240
1.658
0.198
0.422
0.041
1.37
14.2%
57.3%
26.5%
13
Stu Scheurwater
271
255
16
94.1%
1.36
8
8
94.3%
-0.2%
6
2
33.3%
5.79
+0.21
+0.0008
0.114
0.016
0.042
0.004
1.30
10.4%
64.8%
12.9%
14
Mark Ripperger
329
300
29
91.2%
0.97
11
18
91.3%
-0.1%
8
4
50.0%
9.27
-1.27
-0.0039
0.705
0.100
0.081
0.008
1.44
21.1%
58.0%
14.1%
15
Adrian Johnson
667
612
55
91.8%
1.04
35
20
91.8%
-0.0%
24
17
70.8%
17.33
+6.67
+0.0100
3.132
0.330
0.221
0.023
1.29
20.3%
54.3%
19.2%
16
Brock Ballou
122
110
12
90.2%
0.79
7
5
90.1%
+0.1%
2
2
100.0%
4.47
-2.47
-0.0203
0.307
0.036
0.000
0.000
1.18
24.5%
59.8%
27.4%
17
Brian O'Nora
480
446
34
92.9%
1.00
22
12
92.8%
+0.1%
14
8
57.1%
11.91
+2.09
+0.0044
1.308
0.190
0.145
0.015
1.34
17.0%
64.5%
19.1%
18
Ryan Blakney
427
395
32
92.5%
1.15
15
17
92.3%
+0.2%
13
6
46.2%
10.92
+2.08
+0.0049
0.707
0.060
0.301
0.028
1.38
18.9%
56.6%
25.8%
19
Jim Wolf
148
136
12
91.9%
0.84
5
7
91.6%
+0.3%
3
3
100.0%
3.54
-0.54
-0.0037
0.512
0.016
0.000
0.000
0.35
15.7%
55.8%
18.7%
20
Charlie Ramos
432
402
30
93.1%
1.06
16
14
92.7%
+0.3%
13
8
61.5%
9.79
+3.21
+0.0074
0.928
0.069
0.193
0.015
0.89
15.3%
60.0%
29.1%
21
Cory Blaser
315
294
21
93.3%
1.06
14
7
93.0%
+0.4%
8
6
75.0%
8.42
-0.42
-0.0013
0.577
0.053
0.012
0.001
1.71
24.7%
61.8%
21.7%
22
Mike Estabrook
445
412
33
92.6%
1.17
16
17
92.1%
+0.4%
15
12
80.0%
12.45
+2.55
+0.0057
1.569
0.201
0.072
0.008
1.07
18.6%
62.1%
19.0%
23
Doug Eddings
466
435
31
93.3%
1.10
24
7
92.9%
+0.4%
13
8
61.5%
11.58
+1.42
+0.0031
1.156
0.055
0.115
0.005
0.40
20.5%
60.6%
19.6%
24
Rob Drake
454
418
36
92.1%
1.10
20
16
91.5%
+0.6%
13
5
38.5%
8.69
+4.31
+0.0095
0.617
0.047
0.354
0.034
1.38
17.9%
56.3%
18.6%
25
Manny Gonzalez
468
432
36
92.3%
0.94
19
17
91.7%
+0.6%
17
11
64.7%
9.90
+7.10
+0.0152
2.238
0.210
0.227
0.021
1.23
21.3%
53.4%
21.0%
26
Jordan Baker
441
413
28
93.7%
1.02
21
7
93.0%
+0.6%
8
2
25.0%
8.61
-0.61
-0.0014
0.217
0.058
0.146
0.006
1.01
5.9%
60.3%
10.5%
27
David Rackley
594
552
42
92.9%
0.91
27
15
92.3%
+0.6%
14
5
35.7%
13.49
+0.51
+0.0009
0.572
0.029
0.233
0.014
0.54
14.8%
56.3%
18.1%
28
Roberto Ortiz
145
133
12
91.7%
0.66
6
6
91.0%
+0.7%
4
1
25.0%
2.68
+1.32
+0.0091
0.181
0.016
0.110
0.011
1.01
6.1%
52.6%
19.0%
29
Marvin Hudson
563
521
42
92.5%
1.18
27
15
91.8%
+0.7%
13
7
53.8%
12.57
+0.43
+0.0008
1.880
0.213
0.219
0.023
1.92
18.4%
50.8%
14.6%
30
Junior Valentine
297
277
20
93.3%
0.67
10
10
92.6%
+0.7%
5
4
80.0%
6.64
-1.64
-0.0055
0.657
0.048
0.001
0.000
1.04
17.0%
50.7%
4.9%
31
Lance Barksdale
467
434
33
92.9%
0.78
20
13
92.1%
+0.8%
12
5
41.7%
11.30
+0.70
+0.0015
0.562
0.061
0.170
0.015
1.09
10.7%
57.5%
15.2%
32
Nate Tomlinson
432
401
31
92.8%
1.11
15
16
92.0%
+0.8%
12
6
50.0%
10.89
+1.11
+0.0026
1.145
0.078
0.168
0.016
1.13
17.8%
56.2%
16.2%
33
Sean Barber
328
309
19
94.2%
0.87
10
9
93.3%
+0.9%
8
6
75.0%
6.16
+1.84
+0.0056
0.767
0.037
0.049
0.005
0.41
17.0%
60.3%
16.6%
34
John Libka
130
121
9
93.1%
0.88
3
6
92.2%
+0.9%
1
0
0.0%
2.97
-1.97
-0.0152
0.000
0.000
0.000
0.000
0.64
5.7%
78.3%
0.2%
35
Bruce Dreckman
478
442
36
92.5%
0.99
20
16
91.5%
+1.0%
15
8
53.3%
10.56
+4.44
+0.0093
1.927
0.171
0.312
0.021
1.19
21.9%
52.5%
18.8%
36
Tripp Gibson
531
493
38
92.8%
1.10
22
16
91.8%
+1.1%
13
7
53.8%
14.65
-1.65
-0.0031
1.344
0.145
0.135
0.014
1.01
16.1%
58.5%
17.3%
37
Clint Vondrak
274
260
14
94.9%
1.31
9
5
93.8%
+1.1%
2
2
100.0%
4.90
-2.90
-0.0106
0.114
0.014
0.000
0.000
0.47
18.5%
76.8%
25.0%
38
Bill Miller
432
398
34
92.1%
1.05
20
14
91.0%
+1.1%
11
7
63.6%
12.34
-1.34
-0.0031
1.225
0.109
0.103
0.005
1.21
18.0%
57.8%
23.6%
39
Brennan Miller
371
347
24
93.5%
1.28
6
18
92.4%
+1.2%
7
4
57.1%
10.64
-3.64
-0.0098
1.251
0.143
0.093
0.010
2.61
22.4%
38.4%
6.4%
40
Brian Walsh
142
134
8
94.4%
1.86
4
4
93.2%
+1.2%
3
2
66.7%
3.21
-0.21
-0.0015
0.109
0.017
0.005
0.000
0.62
28.8%
72.2%
7.7%
41
Chad Whitson
294
274
20
93.2%
1.01
11
9
92.0%
+1.2%
11
10
90.9%
9.22
+1.78
+0.0061
2.717
0.236
0.024
0.002
1.61
30.7%
49.0%
12.1%
42
Gabe Morales
302
281
21
93.0%
1.09
13
8
91.8%
+1.2%
7
3
42.9%
6.31
+0.69
+0.0023
0.183
0.003
0.054
0.003
0.37
12.6%
66.8%
12.6%
43
Ben May
360
333
27
92.5%
1.08
15
12
91.2%
+1.3%
9
4
44.4%
8.04
+0.96
+0.0027
0.927
0.121
0.179
0.017
1.56
16.9%
50.9%
15.0%
44
Vic Carapazza
469
439
30
93.6%
0.99
16
14
92.3%
+1.3%
11
4
36.4%
10.18
+0.82
+0.0017
1.934
0.172
0.258
0.018
1.27
15.6%
56.8%
26.5%
45
Lance Barrett
425
394
31
92.7%
0.81
22
9
91.3%
+1.4%
15
9
60.0%
10.08
+4.92
+0.0116
1.145
0.097
0.125
0.010
0.58
18.5%
64.0%
26.6%
46
Malachi Moore
453
423
30
93.4%
1.09
19
11
91.9%
+1.5%
11
5
45.5%
12.85
-1.85
-0.0041
2.090
0.137
0.063
0.005
1.87
27.6%
40.0%
3.8%
47
Alex Tosi
257
243
14
94.5%
0.95
7
7
93.1%
+1.5%
9
4
44.4%
5.58
+3.42
+0.0133
0.856
0.079
0.175
0.020
1.53
22.4%
48.3%
12.9%
48
Jansen Visconti
290
274
16
94.5%
0.87
11
5
93.0%
+1.5%
7
3
42.9%
5.79
+1.21
+0.0042
0.225
0.019
0.115
0.008
0.48
9.7%
72.9%
38.7%
49
Alfonso Márquez
399
375
24
94.0%
1.32
11
13
92.4%
+1.6%
8
5
62.5%
9.23
-1.23
-0.0031
0.256
0.031
0.032
0.003
0.54
15.5%
74.6%
27.0%
50
Jeremie Rehak
298
280
18
94.0%
0.97
11
7
92.4%
+1.6%
7
3
42.9%
6.90
+0.10
+0.0004
0.675
0.086
0.160
0.016
2.17
17.8%
52.9%
18.5%
Showing 1–50 of 81
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