In Knute Rockne's first year as the head football coach at Notre Dame in 1918, Mohn was the quarterback for a very thin squad that had been decimated due to the military enrollment for World War I. The team went 3-1-2 in a shortened season that was declared "unofficial" by the university. Among Mohn's career highlights were scoring the lone touchdown for the Irish in a 7-7 tie against Great Lakes Navy, and a 73-yard punt return for a touchdown in a 26-6 win at Purdue.
- Schoor, Gene. 100 Years of Notre Dame Football. New York: Morrow and Co. (1987). p. 56-58
- Steele, Michael R. The Fighting Irish Football Encyclopedia. Champaign, IL: Sports Publishing LLC (2002). p. 42
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