Education
Following college, he attended training camp with the Minnesota Vikings, but was cut before the regular season.
Following college, he attended training camp with the Minnesota Vikings, but was cut before the regular season.
He has also played for the Winnipeg Blue Bombers. A defensive end, Walls played collegiate football for the University of Arkansas. In 2004, he was drafted in the fifth round of the NFL Europe draft by the Scottish Claymores.
In February 2005, Walls signed with the Blue Bombers and ended up having one of the most successful rookie seasons in team history.
He led the team in quarterback sacks with 12, second best that season in the Canadian Football League, and was named Canadian Football League Rookie of the Year following the 2005 season. He was recognized as Canadian Football League Lineman of the Week four times during the season and was selected as a Canadian Football League West Division All-Star and a CFLPA All-Star for the season.
During the season, he scored two touchdowns, unusual for a defensive lineman. Walls"s second season saw a similar level of performance, registering eleven quarterback sacks and earning honours as a Canadian Football League East Division All-Star in 2006.
Walls was signed to a new contract by the Blue and Gold heading into the 2009 season.
He is regarded as the best in the league at the strong-side defensive end position, and his new contract reflects that. On February 26, 2010 Gavin was traded to the Montreal Alouettes in exchange for non-import defensive end Stan Van Sichem.