John Keefe Cato (born May 6, 1958) is a former Major League Baseball (MLB) relief pitcher who played for the Cincinnati Reds in 1983 and 1984.

A native of Yonkers, New York, Cato graduated from Fairfield University, where he played college baseball for the Stags and holds many Fairfield pitching records including seven career shutouts and one no-hitter. In 1978, he played collegiate summer baseball with the Harwich Mariners of the Cape Cod Baseball League.^[1] He was the first Fairfield athlete to play in a major professional sport on the major league level after being selected by the Cincinnati Reds in the second round of the 1979 Major League Baseball Draft.^[2]