Ronald John Kramer (June 24, 1935 – September 11, 2010) was a multi-sport college athlete and professional American football player. Kramer attended the University of Michigan from 1953 to 1957, winning a total of nine varsity letters in football, basketball, and track. Playing at left end for the Michigan Wolverines football team from 1954 to 1956, he was selected as a consensus first-team All-American in 1955 and a unanimous first-team All-American in 1956. His jersey (#87) was retired after Kramer's senior year, and he was inducted into both the College Football Hall of Fame and the University of Michigan Athletic Hall of Honor in 1978.