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, August 15.
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 Edwin Jimenez 28 11 39.3% 2458 4 Dexter Kelley 72 29 40.3% 4713 6 Mark Ripperger 97 40 41.2% 6965 5 Louie Krupa 51 21 41.2% 3542 7 Jansen Visconti 77 32 41.6% 6013 8 James Jean 75 32 42.7% 5886 9 Steven Jaschinski 53 23 43.4% 3337 10 Erich Bacchus 69 30 43.5% 6535 11 David Rackley 78 34 43.6% 6249 12 John Libka 72 32 44.4% 6111 13 Jonathan Parra 49 22 44.9% 3759 15 Ryan Additon 115 52 45.2% 7395 14 Austin Jones 62 28 45.2% 4971 16 Nic Lentz 103 47 45.6% 7164 17 Alex Tosi 90 42 46.7% 6526 18 Scott Barry 74 35 47.3% 5781 20 Will Little 103 49 47.6% 6983 19 Adam Hamari 82 39 47.6% 7388 21 Edwin Moscoso 94 45 47.9% 6328 22 Nestor Ceja 108 52 48.1% 7523 23 Chris Conroy 83 40 48.2% 6485 24 D.J. Reyburn 92 45 48.9% 5988 25 Quinn Wolcott 102 50 49.0% 7278 26 Adam Beck 103 51 49.5% 6888 27 Mark Wegner 100 50 50.0% 7158 27 Emil Jimenez 92 46 50.0% 6433 27 Shane Livensparger 86 43 50.0% 5744 30 Gabe Morales 85 43 50.6% 6394 30 Jeremie Rehak 85 43 50.6% 5756 32 Nick Mahrley 71 36 50.7% 6085 33 Ryan Wills 106 54 50.9% 6793 34 James Hoye 104 53 51.0% 6654 35 Carlos Torres 68 35 51.5% 5895 36 Dan Merzel 95 49 51.6% 6542 37 Vic Carapazza 93 48 51.6% 7372 38 Tom Hanahan 89 46 51.7% 6385 39 Alan Porter 102 53 52.0% 6436 40 Ryan Blakney 73 38 52.1% 5121 41 Tripp Gibson 90 47 52.2% 6843 42 Jim Wolf 105 55 52.4% 6498 43 Nate Tomlinson 82 43 52.4% 6773 44 Chad Fairchild 89 47 52.8% 6398 45 Junior Valentine 81 43 53.1% 6199 46 Mike Muchlinski 88 47 53.4% 7368 47 Ron Kulpa 80 43 53.8% 4817 48 Doug Eddings 94 51 54.3% 6915 49 Lance Barrett 126 69 54.8% 7350 50 Alex MacKay 102 56 54.9% 6785 51 Ramon De Jesus 97 54 55.7% 5739 52 Brian O'Nora 70 39 55.7% 4613 53 Malachi Moore 116 65 56.0% 7241 54 Chris Guccione 107 60 56.1% 6754 55 Jacob Metz 73 41 56.2% 4355 56 Brock Ballou 87 49 56.3% 4908 57 Ben May 71 40 56.3% 5989 58 Brennan Miller 94 53 56.4% 6803 59 Alfonso Márquez 106 60 56.6% 6681 60 John Tumpane 97 55 56.7% 6378 60 Willie Traynor 97 55 56.7% 7919 62 Hunter Wendelstedt 118 67 56.8% 6555 63 Jordan Baker 100 57 57.0% 6589 64 John Bacon 77 44 57.1% 4125 64 Paul Clemons 91 52 57.1% 6926 64 Charlie Ramos 98 56 57.1% 5262 64 Clint Vondrak 84 48 57.1% 6277 64 Jen Pawol 56 32 57.1% 3209 69 Tyler Jones 80 46 57.5% 5123 70 Bruce Dreckman 104 60 57.7% 6792 71 Chad Whitson 88 51 58.0% 6128 72 Bill Miller 103 60 58.3% 6840 73 Lance Barksdale 106 62 58.5% 6930 74 Sean Barber 116 68 58.6% 6502 75 Dan Bellino 103 61 59.2% 6969 75 Laz Diaz 103 61 59.2% 6609 77 Marvin Hudson 69 41 59.4% 5345 78 Mike Estabrook 104 62 59.6% 6662 79 Brian Walsh 102 61 59.8% 6144 80 Rob Drake 90 55 61.1% 6875 81 Cory Blaser 94 58 61.7% 5935 82 Chris Segal 105 65 61.9% 6250 83 Dan Iassogna 114 71 62.3% 7031 84 Felix Neon 40 25 62.5% 1782 85 Stu Scheurwater 107 67 62.6% 6749 86 Roberto Ortiz 97 61 62.9% 6384 87 Manny Gonzalez 96 61 63.5% 6024 88 Todd Tichenor 83 53 63.9% 6478 89 Adrian Johnson 85 55 64.7% 4910 90 Andy Fletcher 83 60 72.3% 4846 91 CB Bucknor 9 7 77.8% 674
