Demary signed with the Carolina Cobras in 2001. He was named to the All-Rookie Team following the season.
Buffalo Destroyers
In 2002 and 2003, Demary played for the Buffalo Destroyers. Playing mostly offensive line, Demary recorded very few stats with the Destroyers.
Los Angeles Avengers
In 2004 through 2007, Demary played with the Los Angeles Avengers. While an Avenger, Demary had the best seasons of his professional career, twice being named to the All Arena Teams, and winning the Arena Football League Defensive Player of the Year Award in 2005. Also in 2005, Demary set the AFL record for sacks in a season with 13.5. The previous record had been 13, held by Craig Walls.[1]
Cleveland Gladiators
Demary finished his AFL career while playing with the Cleveland Gladiators in 2008.