Before entering the coaching ranks Nagle attended school at Marquette University from 1936-1940 and played on the basketball team, lettering in '38/'39 and '39/'40. After graduating from Marquette Nagle enlisted in the United States Army Air Corps where he served from 1940-1944.
| School | Position | Years | Record | 
|---|---|---|---|
| Marquette University | Assistant Coach | 1944-1953 | N/A | 
| Marquette University | Head Coach | 1953-1958 | 69-55 | 
| Whitefish Bay HS | Men's Head Coach | 1958-1973 | N/A | 
| Whitefish Bay HS | Women's Head Coach | 1973-1988 | N/A |