| Johnny MahrtMahrt, John CarlHeight: 5-9 Weight: 180 Born: December 22, 1899 Dayton, OH Died: August 24, 1967 Oakwood, OH High School: University of Dayton Prep (Dayton, OH) | 
| Year | College | Status | 
|---|---|---|
| 1919 | Dayton | |
| 1920 | Dayton | |
| 1921 | Dayton | Lettered | 
| 1922 | Dayton | Lettered | 
| Relatives: Brother of Al Mahrt; brother of Armin Mahrt; brother of Lou Mahrt | 
| Roster Key • Stat Key | 
| YEAR TEAM | NO | POS | GP | GS | 
|---|---|---|---|---|
| 1925 Dayton Triangles (NFL)1925 DAY NFL | 2 | LOE-LDE | 1 | 0 | 
| 1 Year (NFL)1 Year NFL | 1 | 0 | 
| Transaction | Date | Team | 
|---|---|---|
| Signed | 1925 Dayton Triangles (NFL)1925 DAY NFL | |
| Free Agent | 1925 Dayton Triangles (NFL)1925 DAY NFL | 
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| Last Updated: September 17, 2025 |