John Robert Martin (born April 11, 1956) is a former Major League Baseball pitcher.

The Tigers traded him to the St. Louis Cardinals with Al Greene for Jim Lentine on June 2, 1980.

After appearing in 9 games, starting 5, and winning 2 in his rookie year of 1980, with the St. Louis Cardinals, Martin recorded his best year in 1981, recording 8 wins against 5 losses, four complete games, and a 3.42 earned run average (ERA).

Martin adjusted to pitching in relief and bounced back with a 3–1 record and 4.18 ERA.

This biographical article relating to an American baseball pitcher born in the 1950s is a stub.