| Number: | 29 |
| Height Ft: | 6 |
| Height In: | 2 |
| Weight Lbs: | 194 |
| Birth Date: | 29 March 1954 |
| Birth Place: | Pasadena, California, U.S. |
| Position: | Cornerback |
| College: | Oregon |
| High School: | Pasadena (CA) |
| Draftyear: | 1976 |
| Draftround: | 1 |
| Draftpick: | 18 |
| Teams: | |
| Highlights: | |
| Statlabel1: | Interceptions |
| Statvalue1: | 26 |
| Statlabel2: | INT yards |
| Statvalue2: | 438 |
| Statlabel3: | Fumble recoveries |
| Statvalue3: | 3 |
| Statlabel4: | Sacks |
| Statvalue4: | 1 |
| Statlabel5: | Games played |
| Statvalue5: | 126 |
Mario Sean Clark (born March 29, 1954) is an American former professional football player who played as a cornerback for the Buffalo Bills and San Francisco 49ers[1] in the National Football League (NFL). He played college football at the University of Oregon.[2]
While playing with the Bills, Clark recorded 25 NFL interceptions by the age of 27. He added just one more interception for the remainder of his career, finishing with a total of 26 interceptions. Clark won a Super Bowl championship in 1984 as a member of the San Francisco 49ers in Super Bowl XIX.