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, May 1.
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 Erich Bacchus 14 3 21.4% 1869 3 Dexter Kelley 13 3 23.1% 929 4 Louie Krupa 4 1 25.0% 264 5 Derek Thomas 23 6 26.1% 1718 6 John Tumpane 19 5 26.3% 1495 7 David Rackley 24 7 29.2% 1879 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 31 Sean Barber 19 9 47.4% 1585 34 Jordan Baker 21 10 47.6% 1686 35 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 Tripp Gibson 24 12 50.0% 1894 36 Dan Merzel 22 11 50.0% 1477 36 Jen Pawol 4 2 50.0% 308 41 Malachi Moore 31 16 51.6% 2360 42 Ryan Blakney 29 15 51.7% 1961 43 Roberto Ortiz 27 14 51.9% 1820 44 Nestor Ceja 23 12 52.2% 1664 45 Gabe Morales 19 10 52.6% 1753 46 Brennan Miller 15 8 53.3% 1525 47 Willie Traynor 13 7 53.8% 1579 48 Carlos Torres 22 12 54.5% 1739 49 Adrian Johnson 34 19 55.9% 2028 49 Bruce Dreckman 34 19 55.9% 2081 51 Mark Wegner 25 14 56.0% 2156 52 Laz Diaz 32 18 56.3% 2137 53 Bill Miller 30 17 56.7% 2375 53 Chad Whitson 30 17 56.7% 1756 55 D.J. Reyburn 28 16 57.1% 1845 55 Marvin Hudson 21 12 57.1% 1650 55 Ryan Wills 28 16 57.1% 1768 55 Steven Jaschinski 7 4 57.1% 324 59 Chad Fairchild 26 15 57.7% 1992 59 Mike Muchlinski 26 15 57.7% 2015 61 Alfonso Márquez 19 11 57.9% 1705 61 Nick Mahrley 19 11 57.9% 1475 63 Rob Drake 31 18 58.1% 2068 64 Stu Scheurwater 22 13 59.1% 1752 65 Lance Barrett 32 19 59.4% 2066 66 Junior Valentine 20 12 60.0% 1795 67 Dan Bellino 33 20 60.6% 1761 68 Doug Eddings 28 17 60.7% 1874 69 Hunter Wendelstedt 41 25 61.0% 1973 70 Cory Blaser 18 11 61.1% 1156 71 Dan Iassogna 34 21 61.8% 2085 72 Brock Ballou 16 10 62.5% 1127 73 Chris Guccione 27 17 63.0% 1784 74 Mike Estabrook 30 19 63.3% 2087 74 Charlie Ramos 30 19 63.3% 1743 76 John Bacon 28 18 64.3% 1133 77 Jim Wolf 18 12 66.7% 1446 77 Scott Barry 15 10 66.7% 1433 77 Tom Hanahan 21 14 66.7% 1394 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
