He was selected by the Denver Broncos in the third round of the 1975 NFL draft after playing college football at the University of Notre Dame.
[2] Mahalic was selected by the Denver Broncos in the third round, with the 69th overall pick, of the 1975 NFL draft.
[3] On September 17, 1975, he was waived by the Broncos before the start of the 1975 season and claimed by the San Diego Chargers the same day.
[3] On July 20, 1976, the Chargers sold Mahalic to the Philadelphia Eagles for an undisclosed cash sum.
[3] He missed playing time that season due to severe allergies and hip problems.