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. Kramer was selected by the Green Bay Packers as the fourth pick in the 1957 NFL Draft and played for the Packers for seven seasons (1957, 1959–1964). He was a key player on coach Vince Lombardi's first NFL championship teams in 1961 and 1962. Kramer was selected as a first-team All-NFL player in 1962 after catching 37 passes for 555 yards and seven touchdowns. He also played three seasons for the Detroit Lions from 1965 to 1967.