[4] He played for the football team that year as an end[5] and was also chairman of the school's freshman athletic council.

[5] During his time at the University of Wisconsin, Leaper served in the United States Marine Corps during World War I.

[7][8] After the football season, Leaper played basketball as a center and guard for the Northern Paper Mills.

[9][10] He initially did not return to the Packers for the 1920 season, but later rejoined the team in November for their game against the Beloit Fairies, which they lost 14–3.

[5] He worked for them locally as a salesman until 1938, when he was transferred to Cleveland, Ohio, as district sales manager, a position he held until his death.