Melvin Jack Hein (August 22, 1909 – January 31, 1992), nicknamed "Old Indestructible", was an American professional football player. In the era of one-platoon football, he played as a center (then a position on both offense and defense) and was inducted into the College Football Hall of Fame in 1954 and the Pro Football Hall of Fame in 1963 as part of the first class of inductees. He was also named to the National Football League (NFL) 75th, and 100th Anniversary All-Time Teams.
Hein played college football as a center for the Washington State Cougars from 1928 to 1930, leading the 1930 team to the 1931 Rose Bowl after an undefeated regular season. He received first-team All-Pacific Coast and All-American honors.
Hein next played fifteen seasons in the NFL for the New York Giants from 1931 to 1945. He was selected as a first-team All-Pro for eight consecutive years from 1933 to 1940 and won the Joe F. Carr Trophy as the NFL's Most Valuable Player in 1938.