[2] He was a team captain in football, basketball, baseball, and also participated in track in high school.
[4] Mahoney initially announced he would be attending the University of Notre Dame but later enrolled at Creighton College.
[6] He played in seven games, starting four, during his rookie year, scoring one extra point and one receiving touchdown.
[5] Mahoney was the head football coach at St. Leo's High School in Chicago from 1928 to 1930, accumulating an overall record of 14–7–3.
[5] His personal finances were hurt by the Wall Street crash of 1929 and Mahoney moved back to Omaha in 1931.
[5] Mahoney lived and worked at Boys Town from 1947 until his death, spending time as the coordinator of intramural athletics, equipment manager, and postmaster.