The 2005 season was the Detroit Lions' 76th in the National Football League (NFL) and their 82nd since moving to Detroit and becoming the Lions. The Lions failed to improve on their 6–10 record in 2004. During the season, after the Lions lost 27–7 on Thanksgiving Day to the Atlanta Falcons, the Lions fired Steve Mariucci, and hired Dick Jauron to be the interim head coach for the remainder of the season.