| Jack Shaffer | |
| Position: | Forward / center |
| Height Ft: | 6 |
| Height In: | 3 |
| Weight Lb: | 190 |
| Birth Date: | 13 August 1909 |
| Birth Place: | Grand Island, Nebraska |
| Death Place: | Akron, Ohio |
| Nationality: | American |
| College: |
|
| Years1: | 1934–1935 |
| Team1: | Olsen's Terrible Swedes |
| Years2: | 1935–1936 |
| Team2: | Akron Firestones |
| Years3: | 1936–1938 |
| Team3: | Akron Firestone Non-Skids |
| Years4: | 1940–1941 |
| Team4: | Fort Wayne |
John Cleo Shaffer (August 13, 1909 – June 17, 1963) was an American professional basketball player.[1] [2] He appeared in six games for the Akron Firestone Non-Skids in the National Basketball League during the 1937–38 season.[1] [3] A son of Russian immigrants, he grew up in Grand Island, Nebraska and attended the Grand Island campus of Doane University before enrolling at DePaul University.[2] He died of a heart attack in 1963.[2]