| Position: | Tackle |
| Number: | 73, 75 |
| Birth Date: | December 18, 1938 |
| Birth Place: | Portland, Oregon, U.S. |
| Height Ft: | 6 |
| Height In: | 4 |
| Weight Lbs: | 252 |
| Draftyear: | 1961 |
| Draftround: | 11 |
| Draftpick: | 143 |
| High School: | Grant (OR) |
| College: | Oregon |
| Teams: | |
| Statlabel1: | Games played |
| Statvalue1: | 68 |
| Statlabel2: | Fumble recoveries |
| Statvalue2: | 3 |
| Pfr: | MattRi20 |
Riley Carl Mattson (born December 18, 1938) is a former American football offensive tackle in the National Football League (NFL) for the Washington Redskins and the Chicago Bears.