John Francis "Mickey" Colmer (October 23, 1918^[1] – July 20, 2000) was an American football fullback.

Colmer was born in Torrance, California,^[2] in 1918 and attended Redondo Union High School.^[1] He was an All-Southland fullback in 1936.^[3]

He did not play college football, opting instead to play professional baseball after graduating from high school.^[4] He played minor league baseball for three years with the Moline Plowboys (1938), Bisbee Bees (1938-1939), and Tucson Cowboys (1940). He compiled a .353 batting average with Bisbee in 1938. He also appeared in 11 games as a pitcher in 1940.^[2]

Colmer played football while serving in the Army and began playing professionally for the Los Angeles Bulldogs.^[4] He next played professional football in the All-America Football Conference for the Brooklyn Dodgers from 1946 to 1948 and for the New York Yankees in 1949. He appeared in 48 professional football games, 29 of them as a starter, and totaled 1,537 rushing yards, 899 receiving yards, and 21 touchdowns.^[1]

Colmer died in 2000 in Redondo Beach, California.^[1]