John Joseph (Johnny) McCarthy (born April 25, 1934) is an American former basketball player and coach.
Upon graduation, he was selected by the Rochester Royals in the 1956 NBA Draft. He played a total of six seasons in the NBA — two for the Royals, three for the St. Louis Hawks, and one for the Boston Celtics. He also played for the Pittsburgh Rens of the American Basketball League in 1962-63, the final season of that league's brief history.
McCarthy is the first of only three players in NBA history to record a triple-double in his playoff debut, with 13 points, 11 rebounds and 11 assists against the Minneapolis Lakers on March 16, 1960 (he was later joined by Magic Johnson in 1980 and LeBron James in 2006).
In 1965 he took the coaching job at Buffalo's Neumann High School, and turned a team that had been winless the season prior to his arrival into a playoff contender for three of the four years he coached them.
McCarthy later coached the Buffalo Braves, his hometown team, for part of the 1971-72 season. He coached at his alma mater, Canisius, 1974-77.
McCarthy is a member of the Greater Buffalo Sports Hall of Fame.