Mark Ripperger

Mark Anthony Ripperger is an American Major League Baseball umpire. He made his Major League umpiring debut on September 30, 2010. After Ripperger served as a minor–league replacement umpire, he was promoted to full–time status prior to the 2015 season. His uniform number is 90. On April 10, 2025, in a game between the Minnesota Twins and Kansas City Royals, Ripperger became just the second umpire to record a 'perfect game' since Umpire Scorecards began tracking games, calling all 136 taken pitches correctly.