Rex Ryan has fired one of his defensive coaches.
The Bills have fired defensive line coach Karl Dunbar.
Dunbar came to the Bills with Ryan from the Jets.
In a statement Ryan said: "This was a difficult decision as Karl both played for me and then coached on my staff with two different teams and I have a great deal of respect for him. But I feel we needed to make a change and go in a different direction at this point in time and so I have informed Karl that I am relieving him of his duties. I want to take this opportunity to thank Karl and wish him the best of luck in the future."