Benjamin Joseph May (born January 23, 1982) is an American umpire in Major League Baseball (MLB).

[1] A native of Racine, Wisconsin, May comes from an athletic family and graduated from St. Catherine's High School in 2000 and from Marquette University in 2005.

In 2015, according to an investigation by the Denver Post, May had the highest percentage of challenged calls overturned (12 out of 13) in MLB.

[5] By the 2018 regular season he was found to be a top-ten performing home plate umpire in terms of accuracy in calling balls and strikes, based on a study conducted at Boston University where over 350,000 pitches were culled and analyzed.

[7] May was an umpire for the 2011 All-Star Futures Game, and qualifying rounds of the 2013 World Baseball Classic.