John Lewis Mayo (July 26, 1925 – August 19, 2014)[1] was an American professional baseball player who appeared in 139 Major League games for the Philadelphia Phillies between 1948 and 1953.

[4] In 1947, shortly after graduating from the University of Notre Dame where he was captain of the baseball team,[1] Mayo signed with the Phillies as an amateur free agent.

[5] He appeared in three games of the 1950 World Series, and in one plate appearance, in Game 2, he drew a base on balls against Allie Reynolds of the New York Yankees as a pinch hitter for Robin Roberts leading off the tenth inning.

Although Mayo was bunted safely to second base, he remained stranded there as the Yankees won, 2–1.

[6][7] Mayo was part of the team that won the National League pennant in 1950 and was regarded as one of the Philadelphia Whiz Kids.