Zerr was selected by the BC Lions of the Canadian Football League (CFL) in the second round, with the 12th overall pick, of the 2022 CFL draft.[4] He officially signed with the team on May 19. He was moved between the active roster and injured reserve several times during the 2022 season.[5] Overall, Zerr dressed in four games for the Lions.[6][7] He was released on June 4, 2023.[8]
Hamilton Tiger-Cats
Zerr was signed to the practice roster of the Hamilton Tiger-Cats on June 20, 2023.[9][10][11] He was moved between the practice roster and active roster several times during the 2023 season, and dressed in three games for the Tiger-Cats.[7][9] He was released on November 5, 2023.[9]
Saskatchewan Roughriders
Zerr signed with the Saskatchewan Roughriders on December 22, 2023.[12][13][14] He was placed on the 6-game injured list on June 7, 2024.[15] He made his Roughrider debut in week 9 and dressed in ten regular season games in 2024. He was part of training camp cuts in 2025 and was released on May 14, 2025.[16] However, he was re-signed six days later on May 20, 2025.[17]