|Date of birth||March 29, 1954|
|Place of birth||Pasadena, California|
|Height||6 ft 2 in (188 cm)|
|Weight||194 lb (88 kg)|
|High school||Pasadena (CA)|
|NFL draft||1976 / Round: 1 / Pick: 18|
|1984||San Francisco 49ers|
|Career highlights and awards|
Playing for the Bills, Clark was a ballhawk who had 25 NFL interceptions by the age of 27. But Mario Clark managed only one more interception the rest of his career, finishing his NFL career with 26 interceptions.
- Willis, Chris (2014). A Nearly Perfect Season: The Inside Story of the 1984 San Francisco 49ers. Rowman & Littlefield Publishers. p. 212. ISBN 9781442236424. Retrieved 1 February 2016.
- Gehman, Jim (2008). "Then Levy Said to Kelly... ": The Best Buffalo Bills Stories Ever Told. Triumph Books. p. 6. ISBN 9781617490170. Retrieved 1 February 2016.