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 Thursday, May 7.
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 John Tumpane 23 6 26.1% 2036 4 Derek Thomas 23 6 26.1% 1718 6 Erich Bacchus 17 5 29.4% 2158 7 Edwin Jimenez 10 3 30.0% 1199 8 David Rackley 26 8 30.8% 2139 9 Jansen Visconti 19 7 36.8% 1678 10 Chris Conroy 24 9 37.5% 1849 11 John Libka 21 8 38.1% 1977 12 Will Little 34 13 38.2% 2385 13 Lance Barksdale 26 10 38.5% 2036 14 Ramon De Jesus 18 7 38.9% 909 15 Jeremie Rehak 20 8 40.0% 1480 16 Ryan Additon 34 14 41.2% 2207 16 Ben May 17 7 41.2% 1556 18 Nic Lentz 46 19 41.3% 2608 19 Brennan Miller 21 9 42.9% 2060 20 Alex MacKay 23 10 43.5% 1871 21 James Hoye 27 12 44.4% 2100 22 Alex Tosi 29 13 44.8% 1924 23 Tyler Jones 11 5 45.5% 835 24 Alan Porter 26 12 46.2% 1942 24 Shane Livensparger 26 12 46.2% 1993 26 Adam Beck 28 13 46.4% 2128 27 James Jean 15 7 46.7% 1461 28 Adam Hamari 23 11 47.8% 2084 29 Jordan Baker 25 12 48.0% 1992 29 Nate Tomlinson 25 12 48.0% 2388 31 Dan Merzel 27 13 48.1% 1806 31 Austin Jones 27 13 48.1% 1529 33 Mark Ripperger 29 14 48.3% 2151 33 Sean Barber 29 14 48.3% 2122 35 Edwin Moscoso 33 16 48.5% 2146 38 Malachi Moore 37 18 48.6% 2642 36 Vic Carapazza 35 17 48.6% 2671 36 Quinn Wolcott 35 17 48.6% 2479 39 Brian O'Nora 32 16 50.0% 2227 39 Jen Pawol 4 2 50.0% 308 41 Manny Gonzalez 37 19 51.4% 2135 42 Ryan Blakney 29 15 51.7% 1961 43 Gabe Morales 25 13 52.0% 2000 44 Cory Blaser 23 12 52.2% 1430 45 Tripp Gibson 30 16 53.3% 2434 46 Carlos Torres 26 14 53.8% 2263 47 Bruce Dreckman 37 20 54.1% 2357 48 D.J. Reyburn 33 18 54.5% 2077 49 Nestor Ceja 29 16 55.2% 2185 50 Mark Wegner 27 15 55.6% 2468 51 Adrian Johnson 34 19 55.9% 2028 52 Scott Barry 25 14 56.0% 2044 53 Roberto Ortiz 32 18 56.3% 2145 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 58 Nick Mahrley 19 11 57.9% 1475 59 Bill Miller 36 21 58.3% 2719 60 Laz Diaz 41 24 58.5% 2482 61 Mike Muchlinski 29 17 58.6% 2331 62 Chad Whitson 34 20 58.8% 2045 62 Brock Ballou 17 10 58.8% 1446 64 Marvin Hudson 22 13 59.1% 1913 64 Lance Barrett 44 26 59.1% 2664 64 Stu Scheurwater 22 13 59.1% 1752 67 Chris Guccione 32 19 59.4% 2050 68 Dan Bellino 37 22 59.5% 2029 68 Dan Iassogna 37 22 59.5% 2377 70 Junior Valentine 20 12 60.0% 1795 71 Charlie Ramos 36 22 61.1% 1999 72 Doug Eddings 31 19 61.3% 2190 73 Todd Tichenor 24 15 62.5% 2164 74 Alfonso Márquez 27 17 63.0% 2318 75 Hunter Wendelstedt 45 29 64.4% 2242 76 Mike Estabrook 34 22 64.7% 2368 77 Jim Wolf 18 12 66.7% 1446 77 Tom Hanahan 30 20 66.7% 2018 77 Clint Vondrak 15 10 66.7% 1653 77 Willie Traynor 21 14 66.7% 2192 81 John Bacon 34 23 67.6% 1376 82 Jacob Metz 25 18 72.0% 1147 83 Brian Walsh 30 22 73.3% 1667 84 Chris Segal 32 24 75.0% 1960 84 Jonathan Parra 4 3 75.0% 315 86 Paul Clemons 21 16 76.2% 1647 87 CB Bucknor 9 7 77.8% 674 88 Ron Kulpa 14 11 78.6% 683 89 Andy Fletcher 32 27 84.4% 2152 90 Felix Neon 3 3 100.0% 287
