he was selected by the calgary stampeders in the cfl dispersal draft. in 2006, howell recorded twenty catches for 340 yards and a touchdown. howell played in 17 games in 2007, mainly playing on special teams with sporadic appearances on offence. he led calgary in all-purpose yards with 1,299 and he returned 24 kickoffs for a combined total of 475 yards. against saskatchewan he returned a punt for 96 yards which was a season high. in 2008, howell was used as a backup defensive back and also played on special teams. against the montreal alouettes on july 10, he brought his career kickoff return yardage to over 1,500 yards. on august 2, he returned a punt against saskatchewan which brought his career punt return yardage to over 1,500. then, on october 13, once again against the roughriders he played in his 150th career game.