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 Saturday, July 4.
Batter ABS Challenge Leaders Catcher ABS Challenge Leaders MLB Team ABS Challenge Rankings Umpire ABS Challenge Leaders Rank UmpireName Chal ChalW Chal% P 1 Derek Thomas 48 16 33.3% 3311 1 Dexter Kelley 39 13 33.3% 2680 1 Louie Krupa 36 12 33.3% 2334 4 Dillon Wilson 16 6 37.5% 1760 5 Emil Jimenez 52 21 40.4% 4105 6 John Libka 46 19 41.3% 4606 7 Scott Barry 53 22 41.5% 4578 8 Edwin Jimenez 24 10 41.7% 2181 9 James Jean 55 23 41.8% 4685 10 Nic Lentz 74 31 41.9% 5411 11 David Rackley 64 27 42.2% 5045 12 Mark Ripperger 76 33 43.4% 5417 13 Alex Tosi 62 27 43.5% 5051 14 Jonathan Parra 32 14 43.8% 2487 15 Shane Livensparger 57 25 43.9% 4023 16 Adam Beck 75 33 44.0% 5105 17 Will Little 72 32 44.4% 5041 18 Jansen Visconti 65 29 44.6% 4630 19 Austin Jones 48 22 45.8% 3597 20 Erich Bacchus 52 24 46.2% 4851 21 Adam Hamari 56 26 46.4% 4966 22 Chris Conroy 60 28 46.7% 4596 23 James Hoye 74 35 47.3% 5216 24 Quinn Wolcott 76 36 47.4% 5602 25 Vic Carapazza 69 33 47.8% 5632 26 Tom Hanahan 66 32 48.5% 4769 27 Mark Wegner 72 35 48.6% 5387 28 Ryan Additon 86 42 48.8% 5168 29 Nate Tomlinson 63 31 49.2% 5345 31 Jordan Baker 71 35 49.3% 5188 30 Dan Merzel 67 33 49.3% 4750 32 Edwin Moscoso 74 37 50.0% 4881 32 D.J. Reyburn 70 35 50.0% 4532 32 John Tumpane 68 34 50.0% 4870 32 Nestor Ceja 66 33 50.0% 4822 32 Tripp Gibson 64 32 50.0% 5445 32 Tyler Jones 50 25 50.0% 3066 38 Jeremie Rehak 69 35 50.7% 4481 39 Ryan Blakney 67 34 50.7% 4846 39 Ryan Wills 67 34 50.7% 4588 41 Carlos Torres 59 30 50.8% 4825 42 Nick Mahrley 46 24 52.2% 3921 43 Steven Jaschinski 40 21 52.5% 2567 44 Sean Barber 74 39 52.7% 4695 45 Brennan Miller 64 34 53.1% 5037 46 Brian O'Nora 43 23 53.5% 3073 47 Ben May 56 30 53.6% 4836 48 Chad Fairchild 63 34 54.0% 4347 48 Junior Valentine 63 34 54.0% 4689 50 Chris Guccione 83 45 54.2% 5071 51 Alan Porter 66 36 54.5% 4459 52 Cory Blaser 64 36 56.3% 4362 52 Mike Muchlinski 64 36 56.3% 4998 52 Bruce Dreckman 80 45 56.3% 5297 55 Roberto Ortiz 62 35 56.5% 4218 56 Brock Ballou 46 26 56.5% 3153 56 Jen Pawol 46 26 56.5% 2653 58 Jim Wolf 60 34 56.7% 4049 59 Bill Miller 74 42 56.8% 5078 60 Gabe Morales 58 33 56.9% 4057 60 Charlie Ramos 58 33 56.9% 3136 62 Malachi Moore 79 45 57.0% 5187 63 Marvin Hudson 40 23 57.5% 3347 64 Laz Diaz 84 49 58.3% 5060 64 Chad Whitson 60 35 58.3% 4281 66 Clint Vondrak 53 31 58.5% 4211 67 Ramon De Jesus 70 41 58.6% 4091 68 Doug Eddings 68 40 58.8% 4855 69 Adrian Johnson 49 29 59.2% 3054 70 Mike Estabrook 64 38 59.4% 4451 70 Paul Clemons 64 38 59.4% 5211 72 Alfonso Márquez 62 37 59.7% 4490 73 Chris Segal 70 42 60.0% 4418 74 Hunter Wendelstedt 88 53 60.2% 4811 75 Lance Barrett 83 50 60.2% 4949 76 Dan Bellino 78 47 60.3% 5218 77 Lance Barksdale 73 44 60.3% 4700 78 Willie Traynor 56 34 60.7% 5268 79 Jacob Metz 51 31 60.8% 2914 80 Rob Drake 67 41 61.2% 4861 81 Ron Kulpa 52 32 61.5% 2954 82 Alex MacKay 68 42 61.8% 4670 83 Manny Gonzalez 77 48 62.3% 4689 84 Dan Iassogna 81 51 63.0% 5103 84 Felix Neon 27 17 63.0% 1186 86 John Bacon 49 31 63.3% 2526 87 Stu Scheurwater 74 47 63.5% 4723 88 Brian Walsh 71 46 64.8% 4368 89 Todd Tichenor 61 41 67.2% 4470 90 Andy Fletcher 52 38 73.1% 3357 91 CB Bucknor 9 7 77.8% 674
