Major League Baseball implemented the ABS challenge system for the 2026 season, which allows players to challenge a ball or strike call made by the plate umpire. Each team receives two challenges to start the game, and only batters, pitchers and catchers can challenge a call. If a team wins a challenge, it can keep challenging. If a team challenges incorrectly twice, it loses its challenges for the rest of the game.
Here are the ABS challenge system rankings for batters, catchers, teams and umpires for the 2026 MLB season.
Data updated through Friday, July 10.
Batter ABS Challenge Leaders Catcher ABS Challenge Leaders MLB Team ABS Challenge Rankings Umpire ABS Challenge Leaders Rank Name Challenged Overturned Overturn% P 1 Derek Thomas 48 16 33.3% 3311 1 Louie Krupa 36 12 33.3% 2334 3 Dexter Kelley 44 16 36.4% 2927 4 Dillon Wilson 16 6 37.5% 1760 5 Edwin Jimenez 28 11 39.3% 2458 6 Emil Jimenez 58 23 39.7% 4645 7 Nic Lentz 79 32 40.5% 5771 8 John Libka 46 19 41.3% 4606 9 Scott Barry 53 22 41.5% 4578 10 James Jean 55 23 41.8% 4685 11 Mark Ripperger 79 34 43.0% 5734 12 Will Little 74 32 43.2% 5309 13 David Rackley 67 29 43.3% 5342 14 Alex Tosi 62 27 43.5% 5051 15 Jonathan Parra 32 14 43.8% 2487 16 Shane Livensparger 59 26 44.1% 4350 17 Erich Bacchus 54 24 44.4% 5119 18 Jansen Visconti 65 29 44.6% 4630 19 Austin Jones 56 25 44.6% 4151 20 Chris Conroy 60 28 46.7% 4596 21 Quinn Wolcott 79 37 46.8% 5853 22 Adam Beck 81 38 46.9% 5378 23 Vic Carapazza 74 35 47.3% 5934 23 James Hoye 74 35 47.3% 5216 25 Mark Wegner 76 36 47.4% 5737 25 Adam Hamari 57 27 47.4% 5245 27 Ryan Wills 78 38 48.7% 5240 28 Nick Mahrley 53 26 49.1% 4515 28 Tyler Jones 53 26 49.1% 3394 30 Nate Tomlinson 63 31 49.2% 5345 31 Jordan Baker 71 35 49.3% 5188 31 Tom Hanahan 71 35 49.3% 5319 33 Edwin Moscoso 77 38 49.4% 5149 34 Ryan Additon 95 47 49.5% 5526 35 D.J. Reyburn 70 35 50.0% 4532 35 Tripp Gibson 64 32 50.0% 5445 35 Steven Jaschinski 44 22 50.0% 2814 38 Jeremie Rehak 75 38 50.7% 5060 39 Carlos Torres 59 30 50.8% 4825 40 Nestor Ceja 76 39 51.3% 5441 41 Dan Merzel 75 39 52.0% 5053 42 Ryan Blakney 73 38 52.1% 5121 43 John Tumpane 76 40 52.6% 5165 44 Brennan Miller 64 34 53.1% 5037 45 Ben May 56 30 53.6% 4836 46 Sean Barber 80 43 53.8% 5006 47 Junior Valentine 72 39 54.2% 5352 48 Chad Fairchild 68 37 54.4% 4667 49 Alan Porter 77 42 54.5% 5130 49 Brian O'Nora 55 30 54.5% 3628 51 Gabe Morales 60 33 55.0% 4325 52 Brock Ballou 49 27 55.1% 3434 53 Chris Guccione 87 48 55.2% 5324 54 Mike Muchlinski 68 38 55.9% 5292 55 Clint Vondrak 59 33 55.9% 4796 56 Jen Pawol 50 28 56.0% 2921 57 Bruce Dreckman 80 45 56.3% 5297 58 Bill Miller 78 44 56.4% 5398 59 Paul Clemons 68 39 57.4% 5480 60 Doug Eddings 71 41 57.7% 5105 61 Jim Wolf 76 44 57.9% 4626 62 Roberto Ortiz 69 40 58.0% 4731 63 Chad Whitson 65 38 58.5% 4584 64 Cory Blaser 70 41 58.6% 4638 65 Hunter Wendelstedt 99 58 58.6% 5405 66 Ramon De Jesus 73 43 58.9% 4388 67 Willie Traynor 61 36 59.0% 5559 68 Alfonso Márquez 66 39 59.1% 4845 68 Marvin Hudson 44 26 59.1% 3616 68 Charlie Ramos 66 39 59.1% 3454 71 Rob Drake 69 41 59.4% 5139 72 Mike Estabrook 74 44 59.5% 5019 73 Malachi Moore 89 53 59.6% 5516 74 Laz Diaz 87 52 59.8% 5286 75 Dan Bellino 78 47 60.3% 5218 76 Chris Segal 76 46 60.5% 4749 77 Lance Barrett 94 57 60.6% 5337 78 Ron Kulpa 56 34 60.7% 3332 79 Manny Gonzalez 79 48 60.8% 4959 80 Jacob Metz 51 31 60.8% 2914 81 Alex MacKay 74 45 60.8% 4973 82 Lance Barksdale 78 48 61.5% 4960 83 Stu Scheurwater 77 48 62.3% 5010 84 Adrian Johnson 54 34 63.0% 3370 84 Felix Neon 27 17 63.0% 1186 86 Brian Walsh 76 48 63.2% 4632 87 John Bacon 49 31 63.3% 2526 88 Dan Iassogna 88 56 63.6% 5427 89 Todd Tichenor 65 43 66.2% 4777 90 Andy Fletcher 52 38 73.1% 3357 91 CB Bucknor 9 7 77.8% 674
