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 Sunday, May 3.
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 10 1 10.0% 970 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 David Rackley 24 7 29.2% 1879 7 Erich Bacchus 17 5 29.4% 2158 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 Quinn Wolcott 26 10 38.5% 2184 13 Will Little 31 12 38.7% 2120 14 Ramon De Jesus 18 7 38.9% 909 15 Lance Barksdale 23 9 39.1% 1757 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 28 Mark Ripperger 26 12 46.2% 1835 30 James Jean 15 7 46.7% 1461 31 Manny Gonzalez 32 15 46.9% 1863 32 Brennan Miller 17 8 47.1% 1787 33 Adam Hamari 19 9 47.4% 1807 34 Jordan Baker 25 12 48.0% 1992 35 Dan Merzel 27 13 48.1% 1806 35 Austin Jones 27 13 48.1% 1529 37 Vic Carapazza 32 16 50.0% 2426 37 Brian O'Nora 32 16 50.0% 2227 37 Jen Pawol 4 2 50.0% 308 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 Carlos Torres 24 13 54.2% 1993 47 Lance Barrett 35 19 54.3% 2392 48 Adrian Johnson 34 19 55.9% 2028 48 Bruce Dreckman 34 19 55.9% 2081 50 Mark Wegner 25 14 56.0% 2156 50 Sean Barber 25 14 56.0% 1843 52 D.J. Reyburn 28 16 57.1% 1845 52 Rob Drake 35 20 57.1% 2293 52 Ryan Wills 28 16 57.1% 1768 52 Steven Jaschinski 7 4 57.1% 324 56 Chad Fairchild 26 15 57.7% 1992 56 Mike Muchlinski 26 15 57.7% 2015 58 Nick Mahrley 19 11 57.9% 1475 59 Bill Miller 36 21 58.3% 2719 59 Alfonso Márquez 24 14 58.3% 2025 61 Laz Diaz 41 24 58.5% 2482 62 Chad Whitson 34 20 58.8% 2045 63 Marvin Hudson 22 13 59.1% 1913 63 Stu Scheurwater 22 13 59.1% 1752 65 Dan Bellino 37 22 59.5% 2029 66 Scott Barry 20 12 60.0% 1715 66 Junior Valentine 20 12 60.0% 1795 68 Cory Blaser 18 11 61.1% 1156 68 Charlie Ramos 36 22 61.1% 1999 70 Doug Eddings 31 19 61.3% 2190 71 Dan Iassogna 34 21 61.8% 2085 72 Brock Ballou 16 10 62.5% 1127 72 Willie Traynor 16 10 62.5% 1919 74 Chris Guccione 27 17 63.0% 1784 75 Mike Estabrook 30 19 63.3% 2087 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 Jim Wolf 18 12 66.7% 1446 79 Clint Vondrak 15 10 66.7% 1653 81 Todd Tichenor 22 15 68.2% 1935 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
