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, August 4.
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 69 26 37.7% 4776 3 Dexter Kelley 64 25 39.1% 4101 4 Edwin Jimenez 28 11 39.3% 2458 5 Mark Ripperger 92 37 40.2% 6626 6 Louie Krupa 42 17 40.5% 2662 7 John Libka 62 26 41.9% 5546 7 Erich Bacchus 62 26 41.9% 5950 9 Jansen Visconti 73 31 42.5% 5485 10 James Jean 62 27 43.5% 4996 11 David Rackley 78 34 43.6% 6249 12 Nic Lentz 95 42 44.2% 6655 13 Austin Jones 56 25 44.6% 4151 14 Ryan Additon 105 47 44.8% 6500 15 Steven Jaschinski 48 22 45.8% 3062 16 Jonathan Parra 41 19 46.3% 3101 17 Will Little 92 43 46.7% 6405 18 Adam Beck 94 44 46.8% 6309 19 Emil Jimenez 79 37 46.8% 5827 20 Alex Tosi 81 38 46.9% 5872 21 Chris Conroy 78 37 47.4% 6042 22 Mark Wegner 88 42 47.7% 6282 23 Edwin Moscoso 94 45 47.9% 6328 24 Scott Barry 71 34 47.9% 5481 24 Adam Hamari 71 34 47.9% 6529 26 Quinn Wolcott 91 44 48.4% 6445 27 Shane Livensparger 78 38 48.7% 5450 28 D.J. Reyburn 80 39 48.8% 5133 29 Vic Carapazza 89 44 49.4% 7137 30 Nestor Ceja 101 50 49.5% 6935 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 39 James Hoye 95 49 51.6% 6103 38 Carlos Torres 64 33 51.6% 5404 40 Dan Merzel 89 46 51.7% 6246 41 Ryan Blakney 73 38 52.1% 5121 42 Chad Fairchild 87 46 52.9% 6106 43 Tom Hanahan 85 45 52.9% 6082 44 Junior Valentine 77 41 53.2% 5919 45 Brennan Miller 84 45 53.6% 6417 46 Tyler Jones 69 37 53.6% 4549 47 Mike Muchlinski 80 43 53.8% 6478 48 Sean Barber 93 50 53.8% 5633 49 Jim Wolf 90 49 54.4% 5605 50 Ramon De Jesus 89 49 55.1% 5214 51 Lance Barrett 114 63 55.3% 6836 52 Brock Ballou 65 36 55.4% 4022 53 Doug Eddings 83 46 55.4% 6123 54 Charlie Ramos 81 45 55.6% 4443 55 Brian O'Nora 70 39 55.7% 4613 56 Malachi Moore 111 62 55.9% 6946 57 John Tumpane 89 50 56.2% 6018 58 Chris Guccione 96 54 56.3% 5939 59 Ben May 71 40 56.3% 5989 60 Alex MacKay 94 53 56.4% 6137 61 Alfonso Márquez 97 55 56.7% 6307 62 Jordan Baker 95 54 56.8% 6275 63 Hunter Wendelstedt 112 64 57.1% 6260 63 Chad Whitson 77 44 57.1% 5428 63 Jen Pawol 56 32 57.1% 3209 66 Paul Clemons 82 47 57.3% 6340 67 Ron Kulpa 71 41 57.7% 4164 68 Willie Traynor 90 52 57.8% 7294 69 Jacob Metz 64 37 57.8% 3836 70 Clint Vondrak 81 47 58.0% 5706 71 Bruce Dreckman 98 57 58.2% 6221 72 John Bacon 62 37 59.7% 3194 73 Marvin Hudson 67 40 59.7% 5035 74 Bill Miller 98 59 60.2% 6569 74 Mike Estabrook 98 59 60.2% 6334 76 Rob Drake 83 50 60.2% 6589 77 Lance Barksdale 101 61 60.4% 6401 77 Laz Diaz 101 61 60.4% 6338 79 Dan Bellino 97 59 60.8% 6432 80 Brian Walsh 88 54 61.4% 5537 81 Adrian Johnson 70 43 61.4% 4314 82 Roberto Ortiz 84 52 61.9% 5554 83 Cory Blaser 79 49 62.0% 5253 84 Manny Gonzalez 90 56 62.2% 5739 85 Felix Neon 40 25 62.5% 1782 86 Dan Iassogna 106 67 63.2% 6470 87 Chris Segal 98 62 63.3% 5920 88 Todd Tichenor 76 49 64.5% 5892 89 Stu Scheurwater 96 62 64.6% 6129 90 Andy Fletcher 68 50 73.5% 4297 91 CB Bucknor 9 7 77.8% 674
