Simpson was signed by the Green Bay Packers as an undrafted free agent in 2007.[2] He was later signed by the Calgary Stampeders with whom he played with for eight seasons where he won two Grey Cup championships in 2008 and 2014.[3] He announced his retirement on October 10, 2019, four years after his last game with the Stampeders.[4]
Coaching career
On January 3, 2023, it was announced that Simpson had been hired as the defensive line coach for the Calgary Stampeders.[3] He held this position for the 2023 and 2024 seasons. After the 2024 season, the Stampeders announced that Simpson would not be retained on the team’s coaching staff for the 2025 season.[1]