| Clarence Janecek | |
| Number: | 16 |
| Position: | Guard |
| Birth Date: | 1 April 1911 |
| Birth Place: | Chicago, Illinois, U.S. |
| Height Ft: | 6 |
| Height In: | 0 |
| Weight Lbs: | 200 |
| High School: | Chicago (IL) Harrison |
| College: | Purdue |
| Pastteams: | |
| Statlabel1: | Games played |
| Statvalue1: | 11 |
| Pfr: | J/JaneCl20 |
Clarence Robert Janecek (April 1, 1911 – January 16, 1990) was an American football guard who played one season in the National Football League (NFL) with the Pittsburgh Pirates. He played college football at Purdue University and attended Harrison Technical High School in Chicago, Illinois.[1]