Allemang played for Acadia University and was nominated for the J. P. Metras Trophy for outstanding intercollegiate lineman in 1974.
Allemang played college football for the Acadia Axemen as both a tight end and defensive lineman until 1974.
[1] In his final year with the Axemen, Allemang was the AUAA nominee for the newly created J. P. Metras Trophy, an award for the most outstanding lineman in Canadian intercollegiate football.
[7] On 18 May 1979, the Hamilton Tiger-Cats traded Allemang and a draft pick to the Winnipeg Blue Bombers for linebacker Harry Walters and defensive end Jim Heighton.
[13][14] In 1983, Allemang was part of an offensive line that was described as "the worst in the CFL", but they allowed the fewest quarterback sacks and advanced to the East Final before losing to the Toronto Argonauts.
[15][16] The Tiger-Cats advanced to the Grey Cup in 1984 but lost to the Blue Bombers after the offensive line created only 24 rushing yards on nine carries.
[17] In 1985, Allemang was converted from an offensive tackle to a center, and his performance in his new role was described as "commendable" by head coach Al Bruno.
[22] The draft, which was held in secret and intentionally hidden from the media, received harsh criticism from the teams which lost players.
[24] In 1987, he played in 11 regular season games, missing time due to a knee injury which required surgery.