Lavoie was selected 11th overall by the Montreal Alouettes in the 2012 CFL Draft and signed with the team on May 16, 2012 to a two-year contract.

He finished his first season with 33 catches for 307 yards and four touchdowns and was the Alouettes nominee for the CFL's Most Outstanding Rookie Award.

[4] He had a reduced role in 2013 due to injuries as the team also underwent head coaching changes where he only played in 14 games and had six receptions for 46 yards.

[5] He played in 69 games over four years for the Redblacks as the team's primary fullback, recording 86 catches for 796 yards and three touchdowns.

[10] However, he spent the entire 2019 regular season on the injured list due to a back injury and only played in the 2019 West Final where the Roughriders again lost to the Blue Bombers.