| Number: | 99, 23 |
| Position: | Halfback, end |
| Birth Date: | 23 April 1924 |
| Birth Place: | Oak Park, Illinois, U.S. |
| Death Place: | Moreland Hills, Ohio, U.S. |
| Height Ft: | 5 |
| Height In: | 11 |
| Weight Lbs: | 172 |
| High School: | Oak Park (Oak Park, Illinois) |
| College: | Michigan |
| Draftyear: | 1946 |
| Draftround: | 3 |
| Draftpick: | 21 |
| Pastteams: |
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| Statlabel1: | Games played |
| Statvalue1: | 49 |
| Statlabel2: | Receiving yards |
| Statvalue2: | 992 |
| Statlabel3: | Interceptions |
| Statvalue3: | 16 |
| Statlabel4: | Touchdowns |
| Statvalue4: | 5 |
| Pfr: | NussBo20 |
Robert John Nussbaumer (April 23, 1924 – July 26, 1997) was an American football halfback and end in the National Football League (NFL) for the Washington Redskins, Green Bay Packers, and the Chicago Cardinals. He played college football at the University of Michigan as a left halfback from 1943 to 1945 and served in the United States Marine Corps in 1945.[1] He was drafted in the third round of the 1946 NFL draft.
After his playing career ended, he served as an assistant coach in the NFL. He coached the defensive backs for the Detroit Lions from 1957 to 1962 prior to being promoted to defensive coordinator in 1963 after Don Shula left to take over as head coach for the Baltimore Colts. After a year off in 1965, Nussbaumer returned to coach defensive backs with the Cleveland Browns from 1966 through 1971.