Joseph Richard Jay (born August 15, 1935) is an American former professional baseball starting pitcher, who played in Major League Baseball (MLB) from 1953 through 1966, Jay played for the Milwaukee Braves (1953–1955, 1957–1960), Cincinnati Reds (1961–1966) and Atlanta Braves (1966).
He was a switch-hitter and threw right-handed.
In a 13-season big league career, Jay posted a 99–91 win-loss record, with 999 strikeouts, and a 3.77 earned run average (ERA), in 1546.1 innings.
In July 2008, he was inducted into the Cincinnati Reds Hall of Fame.