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, May 23.
Batter ABS Challenge Leaders Catcher ABS Challenge Leaders MLB Team ABS Challenge Rankings Umpire ABS Challenge Leaders Rank UmpireName Chal ChalW Chal% P 1 Dillon Wilson 3 0 0.0% 551 2 Emil Jimenez 26 7 26.9% 2222 3 Edwin Jimenez 10 3 30.0% 1199 4 Derek Thomas 29 9 31.0% 2222 5 John Tumpane 37 12 32.4% 3200 6 Dexter Kelley 27 9 33.3% 1832 7 David Rackley 38 14 36.8% 2984 8 Louie Krupa 13 5 38.5% 893 9 Erich Bacchus 25 10 40.0% 2779 9 Tyler Jones 20 8 40.0% 1405 11 John Libka 32 13 40.6% 2879 12 Nic Lentz 51 21 41.2% 3098 12 Mark Ripperger 34 14 41.2% 2743 12 Adam Beck 34 14 41.2% 2720 15 James Hoye 40 17 42.5% 2996 15 Lance Barksdale 40 17 42.5% 2891 17 Jen Pawol 14 6 42.9% 895 18 Scott Barry 37 16 43.2% 2892 19 Austin Jones 32 14 43.8% 2150 20 Shane Livensparger 34 15 44.1% 2539 21 Brennan Miller 29 13 44.8% 2663 22 Edwin Moscoso 40 18 45.0% 2700 23 Jansen Visconti 31 14 45.2% 2575 24 Alex Tosi 37 17 45.9% 2697 25 Will Little 51 24 47.1% 3228 25 Jeremie Rehak 34 16 47.1% 2417 25 Steven Jaschinski 17 8 47.1% 892 28 Jordan Baker 38 18 47.4% 2897 28 Jonathan Parra 19 9 47.4% 1329 30 Ben May 31 15 48.4% 2788 30 James Jean 31 15 48.4% 2639 32 Quinn Wolcott 39 19 48.7% 3022 33 Ryan Additon 47 23 48.9% 3018 34 D.J. Reyburn 40 20 50.0% 2679 34 Nestor Ceja 38 19 50.0% 2738 34 Alan Porter 34 17 50.0% 2730 34 Adam Hamari 32 16 50.0% 2911 38 Bruce Dreckman 45 23 51.1% 2933 39 Vic Carapazza 41 21 51.2% 3350 40 Tripp Gibson 39 20 51.3% 3077 41 Alex MacKay 37 19 51.4% 2729 42 Dan Merzel 33 17 51.5% 2322 43 Tom Hanahan 48 25 52.1% 3326 44 Chris Guccione 42 22 52.4% 2624 45 Chris Conroy 36 19 52.8% 2726 46 Mark Wegner 30 16 53.3% 2740 47 Mike Muchlinski 43 23 53.5% 3251 48 Brian O'Nora 41 22 53.7% 2830 49 Sean Barber 39 21 53.8% 2652 50 Nick Mahrley 24 13 54.2% 2098 51 Gabe Morales 35 19 54.3% 2490 51 Junior Valentine 35 19 54.3% 2619 53 Dan Bellino 46 25 54.3% 2850 54 Ryan Wills 42 23 54.8% 2901 55 Nate Tomlinson 31 17 54.8% 2926 56 Laz Diaz 54 30 55.6% 3384 57 Malachi Moore 43 24 55.8% 3229 58 Adrian Johnson 34 19 55.9% 2028 58 Brock Ballou 34 19 55.9% 2315 60 Ramon De Jesus 30 17 56.7% 1768 61 Carlos Torres 37 21 56.8% 2841 62 Bill Miller 44 25 56.8% 3260 63 Ryan Blakney 42 24 57.1% 2839 63 Dan Iassogna 42 24 57.1% 2662 63 Charlie Ramos 42 24 57.1% 2286 66 Chad Fairchild 40 23 57.5% 2932 67 Rob Drake 45 26 57.8% 3127 68 Cory Blaser 38 22 57.9% 2493 69 Lance Barrett 50 29 58.0% 3176 70 Roberto Ortiz 43 25 58.1% 2797 71 Marvin Hudson 29 17 58.6% 2492 72 Todd Tichenor 34 20 58.8% 2817 73 Chad Whitson 45 27 60.0% 2844 74 Manny Gonzalez 58 35 60.3% 3269 75 Jim Wolf 33 20 60.6% 2342 76 Mike Estabrook 41 25 61.0% 2954 77 Doug Eddings 40 25 62.5% 2765 78 Paul Clemons 28 18 64.3% 2268 79 Alfonso Márquez 31 20 64.5% 2633 80 Stu Scheurwater 37 24 64.9% 2651 81 Ron Kulpa 29 19 65.5% 1473 82 Hunter Wendelstedt 53 35 66.0% 2803 83 John Bacon 42 28 66.7% 1912 83 Jacob Metz 30 20 66.7% 1503 83 Clint Vondrak 21 14 66.7% 2231 83 Brian Walsh 42 28 66.7% 2491 87 Willie Traynor 31 21 67.7% 2518 88 Chris Segal 51 35 68.6% 2964 89 Andy Fletcher 35 27 77.1% 2469 90 CB Bucknor 9 7 77.8% 674 91 Felix Neon 15 12 80.0% 578
