The North Texas Mean Green football team represents the University of North Texas in the sport of American football. The Mean Green compete in the Football Bowl Subdivision of the National Collegiate Athletics Association. After competing in the Sun Belt Conference between 2001 and 2012, the Mean Green joined Conference USA on July 1, 2013. The team has attained several conference championships, including four consecutive Sun Belt Conference championships. Since Hall of Fame Coach Hayden Fry left after the 1978 season, the team's winning percentage has trended downward. From 2005 to 2012, the team went 22-71, a 24% winning percentage.