He was selected by the Atlanta Falcons in the second round of the 1978 NFL draft and played 12 games that season as a linebacker with the team.[1] Stewart noted his challenges with going from Minnesota's colder climate to the hotter climate in Atlanta.[3] He was cut just prior to the 1979 NFL season and was subsequently signed by the Green Bay Packers.[2] He played three games that season with the Packers.[1] He was released early in the season to make room for Earl Edwards, who was signed.[4]