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 Tuesday, June 30.
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 Louie Krupa 36 12 33.3% 2334 1 Dexter Kelley 36 12 33.3% 2451 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 Edwin Jimenez 24 10 41.7% 2181 9 James Jean 55 23 41.8% 4685 10 John Libka 45 19 42.2% 4322 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 Jansen Visconti 59 26 44.1% 4301 18 Will Little 72 32 44.4% 5041 18 James Hoye 63 28 44.4% 4867 20 Erich Bacchus 49 22 44.9% 4530 21 Austin Jones 48 22 45.8% 3329 22 Chris Conroy 52 24 46.2% 4237 23 Adam Hamari 56 26 46.4% 4966 24 Quinn Wolcott 74 35 47.3% 5329 25 Nate Tomlinson 59 28 47.5% 5028 26 Tom Hanahan 63 30 47.6% 4511 27 Dan Merzel 62 30 48.4% 4458 28 Mark Wegner 72 35 48.6% 5387 29 Ryan Additon 86 42 48.8% 5168 30 Vic Carapazza 67 33 49.3% 5316 30 Jordan Baker 67 33 49.3% 4892 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 55 28 50.9% 4549 41 Sean Barber 74 39 52.7% 4695 42 Steven Jaschinski 36 19 52.8% 2283 43 Ryan Blakney 64 34 53.1% 4584 44 Brennan Miller 62 33 53.2% 4783 45 Nick Mahrley 45 24 53.3% 3619 46 Brian O'Nora 43 23 53.5% 3073 47 Chad Fairchild 63 34 54.0% 4347 47 Junior Valentine 63 34 54.0% 4442 49 Chris Guccione 81 44 54.3% 4811 50 Ben May 53 29 54.7% 4495 51 Alan Porter 62 34 54.8% 4162 52 Laz Diaz 77 43 55.8% 4785 53 Bruce Dreckman 75 42 56.0% 4988 54 Mike Muchlinski 64 36 56.3% 4998 55 Roberto Ortiz 62 35 56.5% 4218 56 Jen Pawol 46 26 56.5% 2653 57 Bill Miller 74 42 56.8% 5078 58 Cory Blaser 58 33 56.9% 4007 58 Gabe Morales 58 33 56.9% 4057 60 Dan Bellino 72 41 56.9% 4878 61 Malachi Moore 75 43 57.3% 4882 62 Marvin Hudson 40 23 57.5% 3347 63 Jim Wolf 59 34 57.6% 3793 64 Charlie Ramos 55 32 58.2% 2882 65 Chad Whitson 60 35 58.3% 4281 66 Clint Vondrak 53 31 58.5% 4211 67 Brock Ballou 41 24 58.5% 2878 68 Doug Eddings 68 40 58.8% 4855 69 Adrian Johnson 49 29 59.2% 3054 70 Willie Traynor 54 32 59.3% 4947 71 Mike Estabrook 64 38 59.4% 4451 71 Rob Drake 64 38 59.4% 4526 73 Lance Barrett 77 46 59.7% 4653 74 Lance Barksdale 73 44 60.3% 4700 75 Paul Clemons 61 37 60.7% 4913 76 Jacob Metz 51 31 60.8% 2914 77 Hunter Wendelstedt 82 50 61.0% 4455 78 Ramon De Jesus 67 41 61.2% 3798 79 Alex MacKay 65 40 61.5% 4365 80 Ron Kulpa 45 28 62.2% 2622 81 Manny Gonzalez 77 48 62.3% 4689 82 Felix Neon 27 17 63.0% 1186 83 Chris Segal 65 41 63.1% 4127 84 John Bacon 49 31 63.3% 2526 85 Stu Scheurwater 74 47 63.5% 4723 86 Dan Iassogna 80 51 63.7% 4808 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
