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 Monday, June 29.
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 Mark Ripperger 69 29 42.0% 4844 11 John Libka 45 19 42.2% 4322 12 Nic Lentz 65 28 43.1% 4836 13 Adam Beck 71 31 43.7% 4827 14 Jonathan Parra 32 14 43.8% 2487 15 Shane Livensparger 57 25 43.9% 4023 16 Jansen Visconti 59 26 44.1% 4301 17 Will Little 72 32 44.4% 5041 17 James Hoye 63 28 44.4% 4867 17 Alex Tosi 54 24 44.4% 4455 20 Erich Bacchus 49 22 44.9% 4530 21 Quinn Wolcott 68 31 45.6% 5012 22 Jordan Baker 59 27 45.8% 4596 23 Austin Jones 48 22 45.8% 3329 24 Chris Conroy 52 24 46.2% 4237 25 Adam Hamari 56 26 46.4% 4966 26 John Tumpane 60 28 46.7% 4595 27 Nate Tomlinson 59 28 47.5% 5028 28 Tom Hanahan 63 30 47.6% 4511 29 Dan Merzel 62 30 48.4% 4458 30 Ryan Additon 86 42 48.8% 5168 31 Nestor Ceja 61 30 49.2% 4504 32 Mark Wegner 67 33 49.3% 5085 32 Vic Carapazza 67 33 49.3% 5316 34 Edwin Moscoso 68 34 50.0% 4590 34 D.J. Reyburn 64 32 50.0% 4244 34 Tyler Jones 50 25 50.0% 3066 37 Sean Barber 69 35 50.7% 4420 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 Steven Jaschinski 33 17 51.5% 1989 42 Ryan Blakney 59 31 52.5% 4310 43 Jeremie Rehak 66 35 53.0% 4173 44 Brennan Miller 62 33 53.2% 4783 45 Nick Mahrley 45 24 53.3% 3619 46 Brian O'Nora 41 22 53.7% 2830 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 Roberto Ortiz 57 32 56.1% 3889 55 Mike Muchlinski 64 36 56.3% 4998 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 Mike Estabrook 57 33 57.9% 4165 65 Charlie Ramos 55 32 58.2% 2882 66 Chad Whitson 60 35 58.3% 4281 67 Clint Vondrak 53 31 58.5% 4211 68 Brock Ballou 41 24 58.5% 2878 69 Doug Eddings 68 40 58.8% 4855 70 Adrian Johnson 49 29 59.2% 3054 71 Willie Traynor 54 32 59.3% 4947 72 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
