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 Thursday, July 2.
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 David Rackley 57 23 40.4% 4691 6 Emil Jimenez 52 21 40.4% 4105 7 Scott Barry 47 19 40.4% 4299 8 John Libka 46 19 41.3% 4606 9 Edwin Jimenez 24 10 41.7% 2181 10 James Jean 55 23 41.8% 4685 11 Nic Lentz 70 30 42.9% 5119 11 Alex Tosi 56 24 42.9% 4731 13 Adam Beck 71 31 43.7% 4827 15 Mark Ripperger 73 32 43.8% 5130 14 Jonathan Parra 32 14 43.8% 2487 16 Shane Livensparger 57 25 43.9% 4023 17 Will Little 72 32 44.4% 5041 17 James Hoye 63 28 44.4% 4867 19 Jansen Visconti 65 29 44.6% 4630 20 Erich Bacchus 49 22 44.9% 4530 21 Austin Jones 48 22 45.8% 3597 22 Adam Hamari 56 26 46.4% 4966 23 Chris Conroy 60 28 46.7% 4596 24 Quinn Wolcott 74 35 47.3% 5329 25 Nate Tomlinson 59 28 47.5% 5028 26 Vic Carapazza 69 33 47.8% 5632 27 Tom Hanahan 66 32 48.5% 4769 28 Mark Wegner 72 35 48.6% 5387 29 Ryan Additon 86 42 48.8% 5168 30 Jordan Baker 67 33 49.3% 4892 30 Dan Merzel 67 33 49.3% 4750 32 John Tumpane 68 34 50.0% 4870 32 Edwin Moscoso 68 34 50.0% 4590 32 Nestor Ceja 66 33 50.0% 4822 32 D.J. Reyburn 64 32 50.0% 4244 32 Tyler Jones 50 25 50.0% 3066 37 Jeremie Rehak 69 35 50.7% 4481 38 Ryan Wills 67 34 50.7% 4588 39 Tripp Gibson 61 31 50.8% 5175 40 Carlos Torres 59 30 50.8% 4825 41 Nick Mahrley 46 24 52.2% 3921 42 Sean Barber 74 39 52.7% 4695 43 Steven Jaschinski 36 19 52.8% 2283 44 Ryan Blakney 64 34 53.1% 4584 45 Brennan Miller 62 33 53.2% 4783 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 81 44 54.3% 4811 51 Alan Porter 66 36 54.5% 4459 52 Laz Diaz 77 43 55.8% 4785 53 Bruce Dreckman 75 42 56.0% 4988 54 Cory Blaser 64 36 56.3% 4362 54 Mike Muchlinski 64 36 56.3% 4998 56 Roberto Ortiz 62 35 56.5% 4218 57 Brock Ballou 46 26 56.5% 3153 57 Jen Pawol 46 26 56.5% 2653 59 Jim Wolf 60 34 56.7% 4049 60 Bill Miller 74 42 56.8% 5078 61 Gabe Morales 58 33 56.9% 4057 61 Charlie Ramos 58 33 56.9% 3136 63 Dan Bellino 72 41 56.9% 4878 64 Malachi Moore 75 43 57.3% 4882 65 Marvin Hudson 40 23 57.5% 3347 66 Chad Whitson 60 35 58.3% 4281 67 Clint Vondrak 53 31 58.5% 4211 68 Ramon De Jesus 70 41 58.6% 4091 69 Doug Eddings 68 40 58.8% 4855 70 Adrian Johnson 49 29 59.2% 3054 71 Mike Estabrook 64 38 59.4% 4451 71 Rob Drake 64 38 59.4% 4526 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 Lance Barksdale 73 44 60.3% 4700 77 Paul Clemons 61 37 60.7% 4913 78 Willie Traynor 56 34 60.7% 5268 79 Jacob Metz 51 31 60.8% 2914 80 Alex MacKay 65 40 61.5% 4365 81 Ron Kulpa 45 28 62.2% 2622 82 Manny Gonzalez 77 48 62.3% 4689 83 Dan Iassogna 81 51 63.0% 5103 83 Felix Neon 27 17 63.0% 1186 85 John Bacon 49 31 63.3% 2526 86 Stu Scheurwater 74 47 63.5% 4723 87 Alfonso Márquez 58 37 63.8% 4154 88 Brian Walsh 71 46 64.8% 4368 89 Todd Tichenor 61 41 67.2% 4470 90 Andy Fletcher 46 33 71.7% 3125 91 CB Bucknor 9 7 77.8% 674
