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 Monday, May 4.
Batter ABS Challenge Leaders Pitcher ABS Challenge Leaders Catcher ABS Challenge Leaders MLB Team ABS Challenge Rankings Umpire ABS Challenge Leaders Rank UmpireName Chal ChalW Chal% P 1 Emil Jimenez 14 3 21.4% 1264 2 Dexter Kelley 13 3 23.1% 929 3 Louie Krupa 4 1 25.0% 264 4 Derek Thomas 23 6 26.1% 1718 5 John Tumpane 22 6 27.3% 1795 6 Erich Bacchus 17 5 29.4% 2158 7 David Rackley 26 8 30.8% 2139 8 Jansen Visconti 16 5 31.3% 1410 9 Ben May 14 5 35.7% 1266 10 Chris Conroy 24 9 37.5% 1849 11 John Libka 21 8 38.1% 1977 12 Lance Barksdale 26 10 38.5% 2036 12 Quinn Wolcott 26 10 38.5% 2184 14 Will Little 31 12 38.7% 2120 15 Ramon De Jesus 18 7 38.9% 909 16 Ryan Additon 28 11 39.3% 1924 17 Jeremie Rehak 20 8 40.0% 1480 18 Shane Livensparger 24 10 41.7% 1752 19 Alex MacKay 21 9 42.9% 1575 19 Nate Tomlinson 21 9 42.9% 2081 19 Edwin Jimenez 7 3 42.9% 904 22 Adam Beck 25 11 44.0% 1855 22 Edwin Moscoso 25 11 44.0% 1839 24 Alex Tosi 27 12 44.4% 1674 24 Tyler Jones 9 4 44.4% 553 26 Nic Lentz 42 19 45.2% 2242 27 James Hoye 22 10 45.5% 1782 28 Alan Porter 26 12 46.2% 1942 29 James Jean 15 7 46.7% 1461 30 Brennan Miller 17 8 47.1% 1787 31 Adam Hamari 19 9 47.4% 1807 32 Jordan Baker 25 12 48.0% 1992 33 Dan Merzel 27 13 48.1% 1806 33 Austin Jones 27 13 48.1% 1529 35 Mark Ripperger 29 14 48.3% 2151 36 Vic Carapazza 35 17 48.6% 2671 37 Brian O'Nora 32 16 50.0% 2227 37 Jen Pawol 4 2 50.0% 308 39 Manny Gonzalez 37 19 51.4% 2135 40 Malachi Moore 31 16 51.6% 2360 41 Tripp Gibson 29 15 51.7% 2184 41 Ryan Blakney 29 15 51.7% 1961 43 Roberto Ortiz 27 14 51.9% 1820 44 Gabe Morales 25 13 52.0% 2000 44 Nestor Ceja 25 13 52.0% 1952 46 Cory Blaser 23 12 52.2% 1430 47 Bruce Dreckman 37 20 54.1% 2357 48 Carlos Torres 24 13 54.2% 1993 49 Lance Barrett 35 19 54.3% 2392 50 D.J. Reyburn 33 18 54.5% 2077 51 Adrian Johnson 34 19 55.9% 2028 52 Mark Wegner 25 14 56.0% 2156 52 Sean Barber 25 14 56.0% 1843 54 Rob Drake 35 20 57.1% 2293 54 Ryan Wills 28 16 57.1% 1768 54 Steven Jaschinski 7 4 57.1% 324 57 Chad Fairchild 26 15 57.7% 1992 57 Mike Muchlinski 26 15 57.7% 2015 59 Nick Mahrley 19 11 57.9% 1475 60 Bill Miller 36 21 58.3% 2719 60 Alfonso Márquez 24 14 58.3% 2025 62 Laz Diaz 41 24 58.5% 2482 63 Chad Whitson 34 20 58.8% 2045 64 Marvin Hudson 22 13 59.1% 1913 64 Stu Scheurwater 22 13 59.1% 1752 66 Dan Bellino 37 22 59.5% 2029 66 Dan Iassogna 37 22 59.5% 2377 68 Scott Barry 20 12 60.0% 1715 68 Junior Valentine 20 12 60.0% 1795 70 Charlie Ramos 36 22 61.1% 1999 71 Doug Eddings 31 19 61.3% 2190 72 Todd Tichenor 24 15 62.5% 2164 72 Brock Ballou 16 10 62.5% 1127 72 Willie Traynor 16 10 62.5% 1919 75 Chris Guccione 27 17 63.0% 1784 76 Tom Hanahan 25 16 64.0% 1690 77 John Bacon 28 18 64.3% 1133 78 Hunter Wendelstedt 45 29 64.4% 2242 79 Mike Estabrook 34 22 64.7% 2368 80 Jim Wolf 18 12 66.7% 1446 80 Clint Vondrak 15 10 66.7% 1653 82 Jacob Metz 21 15 71.4% 812 83 Brian Walsh 30 22 73.3% 1667 84 Chris Segal 32 24 75.0% 1960 85 Paul Clemons 17 13 76.5% 1355 86 CB Bucknor 9 7 77.8% 674 87 Ron Kulpa 14 11 78.6% 683 88 Andy Fletcher 28 24 85.7% 1866 89 Felix Neon 3 3 100.0% 287
