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, pitchers, catchers, teams and umpires for the 2026 MLB season.
Data updated through Friday, April 10.
Batter ABS Challenge Leaders Pitcher ABS Challenge Leaders Catcher ABS Challenge Leaders MLB Team ABS Challenge Rankings Umpire ABS Challenge Leaders Rank Name Pitches Calls Overturn Pitches 1 Will Little 10 1 10.0% 919 2 Erich Bacchus 9 1 11.1% 920 3 John Tumpane 7 1 14.3% 603 4 Derek Thomas 5 1 20.0% 363 4 Dexter Kelley 5 1 20.0% 304 4 James Jean 5 1 20.0% 602 4 Emil Jimenez 5 1 20.0% 299 8 Quinn Wolcott 9 2 22.2% 1198 9 Jordan Baker 8 2 25.0% 834 9 Chris Conroy 4 1 25.0% 662 11 Ryan Additon 7 2 28.6% 649 12 Nestor Ceja 9 3 33.3% 872 12 Shane Livensparger 6 2 33.3% 609 12 Stu Scheurwater 6 2 33.3% 581 12 Mike Muchlinski 3 1 33.3% 517 12 John Libka 3 1 33.3% 497 12 Edwin Jimenez 3 1 33.3% 274 18 David Rackley 14 5 35.7% 1203 19 Vic Carapazza 11 4 36.4% 923 19 D.J. Reyburn 11 4 36.4% 648 19 Ramon De Jesus 11 4 36.4% 634 22 Adam Beck 8 3 37.5% 598 22 Edwin Moscoso 8 3 37.5% 666 24 Mark Ripperger 13 5 38.5% 943 24 Rob Drake 13 5 38.5% 903 26 Alan Porter 5 2 40.0% 541 26 Austin Jones 5 2 40.0% 355 28 Lance Barksdale 12 5 41.7% 888 29 Gabe Morales 7 3 42.9% 569 29 Roberto Ortiz 7 3 42.9% 579 29 Jansen Visconti 7 3 42.9% 553 29 Jeremie Rehak 7 3 42.9% 570 33 Ben May 9 4 44.4% 664 33 Alex Tosi 9 4 44.4% 519 35 Nick Mahrley 11 5 45.5% 925 35 Malachi Moore 11 5 45.5% 870 37 Ryan Blakney 13 6 46.2% 856 38 Carlos Torres 12 6 50.0% 921 38 Nate Tomlinson 12 6 50.0% 856 38 Todd Tichenor 10 5 50.0% 886 38 Willie Traynor 6 3 50.0% 664 38 Alex MacKay 2 1 50.0% 263 43 Nic Lentz 23 12 52.2% 1083 44 Manny Gonzalez 19 10 52.6% 945 45 Bruce Dreckman 15 8 53.3% 935 46 Bill Miller 13 7 53.8% 1115 46 Marvin Hudson 13 7 53.8% 1102 48 Tom Hanahan 9 5 55.6% 611 49 Tripp Gibson 16 9 56.3% 1206 50 Brian O'Nora 14 8 57.1% 973 50 Dan Merzel 7 4 57.1% 563 50 Brennan Miller 7 4 57.1% 631 50 Steven Jaschinski 7 4 57.1% 324 54 Scott Barry 5 3 60.0% 608 54 Lance Barrett 20 12 60.0% 1112 56 Doug Eddings 13 8 61.5% 894 56 Charlie Ramos 13 8 61.5% 872 58 Alfonso Márquez 8 5 62.5% 789 58 Laz Diaz 16 10 62.5% 1144 60 Dan Iassogna 17 11 64.7% 1172 61 Dan Bellino 15 10 66.7% 855 61 Adam Hamari 6 4 66.7% 564 61 Brian Walsh 3 2 66.7% 250 64 Hunter Wendelstedt 19 13 68.4% 751 65 Chris Guccione 10 7 70.0% 930 65 Chad Fairchild 10 7 70.0% 574 67 Adrian Johnson 24 17 70.8% 1312 68 James Hoye 7 5 71.4% 605 68 Ryan Wills 7 5 71.4% 645 70 Mark Wegner 18 13 72.2% 1219 71 Cory Blaser 8 6 75.0% 615 71 Sean Barber 8 6 75.0% 604 73 CB Bucknor 9 7 77.8% 674 73 Paul Clemons 9 7 77.8% 538 75 Ron Kulpa 14 11 78.6% 683 76 Mike Estabrook 15 12 80.0% 873 76 Junior Valentine 5 4 80.0% 567 78 Chris Segal 17 14 82.4% 859 79 Andy Fletcher 17 15 88.2% 905 80 Chad Whitson 11 10 90.9% 576 81 Jim Wolf 3 3 100.0% 274 81 Brock Ballou 2 2 100.0% 247 81 Clint Vondrak 2 2 100.0% 573
