| Position: | Defensive tackle |
| Number: | 83 |
| Birth Date: | 8 May 1949 |
| Birth Place: | Marshalltown, Iowa, U.S. |
| Height Ft: | 6 |
| Weight Lb: | 230 |
| Height In: | 4 |
| Draftyear: | 1972 |
| Draftround: | 5 |
| Draftpick: | 125 |
| College: | UCLA |
| Teams: | |
| Highlights: | |
| Statlabel1: | Games played |
| Statvalue1: | 4 |
| Pfr: | ChriBo20 |
Robert Scott Christiansen (born May 8, 1949) is a former professional American football defensive tackle in the National Football League (NFL). He played for the Buffalo Bills in 1972.
For the 1971 season playing for the UCLA Bruins, he was named to the All-Conference First-team. He played for Reseda High School.[1]