Rudolph May, Jr. (born July 18, 1944) is an American former professional baseball player. He played in Major League Baseball as a left-handed pitcher in 1965 and from 1969 to 1983 for the California Angels, New York Yankees, Baltimore Orioles and Montreal Expos. Early in his career, May had a live fastball, but was known best for his "sharp-breaking curve." May was the 1980 American League ERA leader.