Marlin Martin "Pat" Harder (May 6, 1922 – September 6, 1992) was an American football official and player, playing fullback and kicker.

Playing fullback for the Badgers, Harder led the Big Ten Conference in rushing and scoring in 1941.

Harder left Wisconsin to join the United States Marine Corps in 1943 to fight in World War II.

[1] Harder was part of the Cardinals' "Million Dollar Backfield" which also included quarterback Paul Christman and halfbacks Marshall Goldberg and Charley Trippi.

He helped the Lions win back-to-back NFL Championships in 1952 and 1953; in the two games of 1952, he was sent to kick three field goals and six extra points.

Harder was also an alternate, as was Tunney, for the 1967 NFL Championship game, famously known as the "Ice Bowl", when the Green Bay Packers defeated the Dallas Cowboys 21–17.