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 Saturday, May 2.
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 John Libka 16 6 37.5% 1701 11 Quinn Wolcott 26 10 38.5% 2184 12 Will Little 31 12 38.7% 2120 13 Ramon De Jesus 18 7 38.9% 909 14 Lance Barksdale 23 9 39.1% 1757 15 Ryan Additon 28 11 39.3% 1924 16 Jeremie Rehak 20 8 40.0% 1480 17 Shane Livensparger 24 10 41.7% 1752 18 Chris Conroy 21 9 42.9% 1565 18 Alex MacKay 21 9 42.9% 1575 18 Edwin Jimenez 7 3 42.9% 904 21 Adam Beck 25 11 44.0% 1855 21 Edwin Moscoso 25 11 44.0% 1839 23 Alex Tosi 27 12 44.4% 1674 23 Alan Porter 18 8 44.4% 1728 23 Nate Tomlinson 18 8 44.4% 1799 23 Tyler Jones 9 4 44.4% 553 27 James Hoye 22 10 45.5% 1782 28 Mark Ripperger 26 12 46.2% 1835 29 James Jean 15 7 46.7% 1461 30 Manny Gonzalez 32 15 46.9% 1863 31 Nic Lentz 38 18 47.4% 1963 31 Adam Hamari 19 9 47.4% 1807 33 Jordan Baker 25 12 48.0% 1992 34 Dan Merzel 27 13 48.1% 1806 34 Austin Jones 27 13 48.1% 1529 36 Vic Carapazza 32 16 50.0% 2426 36 Brian O'Nora 32 16 50.0% 2227 36 Jen Pawol 4 2 50.0% 308 39 Malachi Moore 31 16 51.6% 2360 40 Tripp Gibson 29 15 51.7% 2184 40 Ryan Blakney 29 15 51.7% 1961 42 Roberto Ortiz 27 14 51.9% 1820 43 Gabe Morales 25 13 52.0% 2000 43 Nestor Ceja 25 13 52.0% 1952 45 Brennan Miller 15 8 53.3% 1525 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 Laz Diaz 32 18 56.3% 2137 53 Bill Miller 30 17 56.7% 2375 54 D.J. Reyburn 28 16 57.1% 1845 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 Alfonso Márquez 19 11 57.9% 1705 59 Nick Mahrley 19 11 57.9% 1475 61 Rob Drake 31 18 58.1% 2068 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 Junior Valentine 20 12 60.0% 1795 66 Dan Bellino 33 20 60.6% 1761 67 Doug Eddings 28 17 60.7% 1874 68 Cory Blaser 18 11 61.1% 1156 69 Dan Iassogna 34 21 61.8% 2085 70 Brock Ballou 16 10 62.5% 1127 70 Willie Traynor 16 10 62.5% 1919 72 Chris Guccione 27 17 63.0% 1784 73 Mike Estabrook 30 19 63.3% 2087 73 Charlie Ramos 30 19 63.3% 1743 75 Tom Hanahan 25 16 64.0% 1690 76 John Bacon 28 18 64.3% 1133 77 Hunter Wendelstedt 45 29 64.4% 2242 78 Jim Wolf 18 12 66.7% 1446 78 Scott Barry 15 10 66.7% 1433 80 Todd Tichenor 22 15 68.2% 1935 81 Clint Vondrak 10 7 70.0% 1375 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
