The Philadelphia Eagles have fired defensive coordinator Juan Castillo and replaced him with secondary coach Todd Bowles.
The Eagles made the move Tuesday with the team stuck at 3-3 after blowing a 10-point lead in the fourth quarter of a 26-23 overtime loss to Detroit.
Coach Andy Reid made the surprising switch before last season of making Castillo the defensive coordinator after 13 seasons of coaching offensive linemen. Castillo has been under the microscope in Philadelphia, with nearly every move he's made being scrutinized intensely.
Reid says six games into the season, ''average isn't good enough. I know the potential of our team and insist on maximizing it.''
Castillo joined the Eagles in 1995 as an offensive assistant under coach Ray Rhodes. He was promoted to tight ends coach in 1997, and then offensive line coach in 1998.
The Eagles have a bye this week.