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 Friday, August 7.
Batter ABS Challenge Leaders Catcher ABS Challenge Leaders MLB Team ABS Challenge Rankings Umpire ABS Challenge Leaders Rank Name Challenged Overturned Overturn% P 1 Dillon Wilson 22 7 31.8% 2281 2 Derek Thomas 71 26 36.6% 5091 3 Dexter Kelley 64 25 39.1% 4101 4 Edwin Jimenez 28 11 39.3% 2458 5 John Libka 64 26 40.6% 5778 6 Mark Ripperger 97 40 41.2% 6965 7 James Jean 67 28 41.8% 5306 8 Louie Krupa 43 18 41.9% 2944 9 Jansen Visconti 75 32 42.7% 5759 10 Erich Bacchus 65 28 43.1% 6265 11 Austin Jones 58 25 43.1% 4451 12 David Rackley 78 34 43.6% 6249 13 Nic Lentz 95 42 44.2% 6655 14 Jonathan Parra 47 21 44.7% 3407 15 Ryan Additon 107 48 44.9% 6786 16 Steven Jaschinski 48 22 45.8% 3062 17 Will Little 97 45 46.4% 6664 18 Emil Jimenez 79 37 46.8% 5827 19 Alex Tosi 81 38 46.9% 5872 20 Adam Hamari 72 34 47.2% 6818 21 Scott Barry 74 35 47.3% 5781 22 Edwin Moscoso 94 45 47.9% 6328 23 Chris Conroy 83 40 48.2% 6485 24 Shane Livensparger 78 38 48.7% 5450 25 D.J. Reyburn 84 41 48.8% 5416 26 Mark Wegner 92 45 48.9% 6588 27 Vic Carapazza 89 44 49.4% 7137 30 Nestor Ceja 101 50 49.5% 6935 29 Adam Beck 99 49 49.5% 6607 28 Quinn Wolcott 95 47 49.5% 6750 31 Alan Porter 92 46 50.0% 6093 31 Tripp Gibson 82 41 50.0% 6552 31 Nick Mahrley 68 34 50.0% 5744 34 Ryan Wills 101 51 50.5% 6487 35 Jeremie Rehak 85 43 50.6% 5756 36 Gabe Morales 75 38 50.7% 5786 37 Nate Tomlinson 74 38 51.4% 6164 38 James Hoye 95 49 51.6% 6103 39 Dan Merzel 89 46 51.7% 6246 40 Ryan Blakney 73 38 52.1% 5121 41 Carlos Torres 67 35 52.2% 5628 42 Chad Fairchild 87 46 52.9% 6106 43 Tom Hanahan 85 45 52.9% 6082 44 Jim Wolf 94 50 53.2% 5913 45 Ron Kulpa 77 41 53.2% 4538 45 Junior Valentine 77 41 53.2% 5919 47 Doug Eddings 86 46 53.5% 6373 48 Brennan Miller 84 45 53.6% 6417 49 Tyler Jones 69 37 53.6% 4549 50 Mike Muchlinski 83 45 54.2% 6790 51 Brock Ballou 70 38 54.3% 4293 52 Ramon De Jesus 92 50 54.3% 5478 53 Lance Barrett 114 63 55.3% 6836 54 Sean Barber 101 56 55.4% 5900 55 Brian O'Nora 70 39 55.7% 4613 56 Malachi Moore 111 62 55.9% 6946 57 Charlie Ramos 89 50 56.2% 4739 58 Chad Whitson 80 45 56.3% 5789 59 Ben May 71 40 56.3% 5989 60 Alex MacKay 94 53 56.4% 6137 61 Chris Guccione 101 57 56.4% 6179 62 Alfonso Márquez 97 55 56.7% 6307 62 John Tumpane 97 55 56.7% 6378 64 Jordan Baker 95 54 56.8% 6275 65 Hunter Wendelstedt 112 64 57.1% 6260 65 Jen Pawol 56 32 57.1% 3209 67 Paul Clemons 82 47 57.3% 6340 68 Bruce Dreckman 104 60 57.7% 6487 69 Willie Traynor 90 52 57.8% 7294 70 Jacob Metz 64 37 57.8% 3836 71 Clint Vondrak 83 48 57.8% 5960 72 Laz Diaz 103 61 59.2% 6609 73 Marvin Hudson 67 40 59.7% 5035 73 John Bacon 67 40 59.7% 3560 75 Dan Bellino 100 60 60.0% 6717 75 Brian Walsh 95 57 60.0% 5845 77 Bill Miller 98 59 60.2% 6569 77 Mike Estabrook 98 59 60.2% 6334 79 Rob Drake 83 50 60.2% 6589 80 Lance Barksdale 101 61 60.4% 6401 81 Cory Blaser 87 53 60.9% 5598 82 Adrian Johnson 70 43 61.4% 4314 83 Roberto Ortiz 89 55 61.8% 5811 84 Chris Segal 105 65 61.9% 6250 85 Felix Neon 40 25 62.5% 1782 86 Dan Iassogna 106 67 63.2% 6470 87 Manny Gonzalez 96 61 63.5% 6024 88 Todd Tichenor 80 51 63.7% 6177 89 Stu Scheurwater 96 62 64.6% 6129 90 Andy Fletcher 68 50 73.5% 4297 91 CB Bucknor 9 7 77.8% 674
