The Buffalo Bills released Kawika Mitchell on Friday after coming to an injury settlement with the veteran linebacker, the team announced Friday.
"We came to a mutual agreement. It was time," Mitchell wrote on his Twitter page Friday. "I hope my friends (fans) in Buffalo loved me as a player and continue to follow and support me as I move on to the next place in my life."
Mitchell was placed on injured reserve prior to the Bills' season opener against Miami after he hurt his foot in practice.
A backup to linebacker Andra Davis, Mitchell was coming back from a right knee injury that forced him to miss the final 11 regular-season games in 2009 after he went on injured reserve.
Mitchell appeared in 21 games for the Bills since joining the team before the 2008 season. He registered 109 total tackles, four sacks and two interceptions with Buffalo.
The Associated Press contributed to this report.