Harris' role with the Bears decreased since he injured his knee during a Week 3 game of the 2007 season. The injury hampered his performance throughout portions of the 2008 season, and into the 2010 season. Nevertheless, Harris recorded eight sacks in 2007 despite starting in 13 games that season. On November 8, 2009, Harris was ejected just 65 seconds into the first quarter in a game against the Arizona Cardinals for punching guard Deuce Lutui in the face. He later apologized for the incident.