Walls signed with the Calgary Stampeders on September 22, 2008. His first two weeks with Calgary were spent on the practice roster before being activated and starting against the Saskatchewan Roughriders on October 13.
Walls joined the Calgary Stampeders on September 22, 2008. His initial period with the team was spent on the practice roster before being activated and starting a matchup against the Saskatchewan Roughriders on October 13.