| Biographical details | |
|---|---|
| Born | June 2, 1903 Newton Highlands, Massachusetts, U.S.[1] |
| Died | February 14, 1971 (aged 67) Sun City, Arizona, U.S. |
| Playing career | |
| Football | |
| 1924–1926 | Purdue |
| Position(s) | Center |
| Coaching career (HC unless noted) | |
| Football | |
| 1927–1928 | Bates (assistant) |
| 1934–1937 | South Dakota State |
| 1938–1944 | Winnipeg Blue Bombers |
| Basketball | |
| 1930–1933 | South Dakota State |
| 1936–1937 | South Dakota State |
| Administrative career (AD unless noted) | |
| 1934–1937 | South Dakota State |
| Head coaching record | |
| Overall | 17–19–2 (college football) 25–32 (college basketball) |
Reginald H. "Red" Threlfall (June 2, 1903 – February 14, 1971) was an American football, basketball and Canadian football coach. He served as the head football coach at South Dakota State University in Brookings, South Dakota, from 1934 to 1937, compiling a record of 17–19–2.[2] Threlfall was the head coach of the Winnipeg Blue Bombers of the Canadian Football League (CFL) from 1938 to 1944.[3]