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 Sunday, August 16.
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 31 12 38.7% 2710 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 Erich Bacchus 72 31 43.1% 6878 10 Steven Jaschinski 53 23 43.4% 3337 11 David Rackley 78 34 43.6% 6249 11 John Libka 78 34 43.6% 6435 14 Ryan Additon 115 52 45.2% 7395 13 Austin Jones 62 28 45.2% 4971 15 Jonathan Parra 55 25 45.5% 4039 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 27 Adam Beck 109 54 49.5% 7187 26 Emil Jimenez 95 47 49.5% 6728 28 Mark Wegner 100 50 50.0% 7158 28 Shane Livensparger 86 43 50.0% 5744 30 Tripp Gibson 95 48 50.5% 7131 31 Gabe Morales 85 43 50.6% 6394 31 Jeremie Rehak 85 43 50.6% 5756 33 Nick Mahrley 71 36 50.7% 6085 34 Ryan Wills 106 54 50.9% 6793 35 James Hoye 104 53 51.0% 6654 36 Carlos Torres 68 35 51.5% 5895 37 Dan Merzel 95 49 51.6% 6542 38 Vic Carapazza 93 48 51.6% 7372 39 Tom Hanahan 89 46 51.7% 6385 40 Nate Tomlinson 85 44 51.8% 7097 41 Alan Porter 102 53 52.0% 6436 42 Ryan Blakney 73 38 52.1% 5121 43 Jim Wolf 105 55 52.4% 6498 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% 6002 52 Brian O'Nora 70 39 55.7% 4613 53 Willie Traynor 100 56 56.0% 8171 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 61 Jordan Baker 100 57 57.0% 6589 62 John Bacon 77 44 57.1% 4125 62 Paul Clemons 91 52 57.1% 6926 62 Malachi Moore 119 68 57.1% 7526 62 Charlie Ramos 98 56 57.1% 5262 62 Clint Vondrak 84 48 57.1% 6277 62 Jen Pawol 56 32 57.1% 3209 68 Tyler Jones 80 46 57.5% 5123 69 Bruce Dreckman 104 60 57.7% 6792 70 Chad Whitson 88 51 58.0% 6128 71 Bill Miller 103 60 58.3% 6840 72 Lance Barksdale 106 62 58.5% 6930 73 Sean Barber 116 68 58.6% 6502 74 Brian Walsh 107 63 58.9% 6476 75 Hunter Wendelstedt 129 76 58.9% 6844 76 Dan Bellino 103 61 59.2% 6969 76 Laz Diaz 103 61 59.2% 6609 78 Marvin Hudson 69 41 59.4% 5345 79 Mike Estabrook 104 62 59.6% 6662 80 Cory Blaser 98 59 60.2% 6253 81 Todd Tichenor 87 53 60.9% 6760 82 Rob Drake 90 55 61.1% 6875 83 Chris Segal 105 65 61.9% 6250 84 Dan Iassogna 114 71 62.3% 7031 85 Felix Neon 40 25 62.5% 1782 86 Stu Scheurwater 107 67 62.6% 6749 87 Roberto Ortiz 97 61 62.9% 6384 88 Manny Gonzalez 96 61 63.5% 6024 89 Adrian Johnson 85 55 64.7% 4910 90 Andy Fletcher 83 60 72.3% 4846 91 CB Bucknor 9 7 77.8% 674
