Sirles (foot) announced via his personal twitter account Monday that he has retired from the NFL.

Sirles (foot) has been released with an injury settlement.

The Bills placed Sirles (foot) on injured reserve Tuesday, Jay Skurski of BuffaloNews.com reports.

Sirles signed a one-year contract with the Bills on Wednesday, Sal Capaccio of WGR Sports Radio 550 Buffalo reports.

Sirles signed with the Bills on Tuesday, Chris Brown of the team's official site reports.

Sirles (hamstring) was released from the Panthers' injured reserve on Thursday with an injury settlement, Jourdan Rodrigue of The Charlotte Observer reports.

The Panthers placed Sirles (hamstring) on injured reserve Saturday, Bill Voth of the team's official site reports.

Sirles (hamstring) is not practicing Monday, Brendan Marks of the Panthers' official site reports.

Sirles pulled his hamstring during Friday's preseason game against the Patriots, Jourdan Rodrigue of The Charlotte Observer reports.

Sirles won't return to Saturday's preseason game against the Patriots after injuring his hamstring, Steve Reed of the Associated Press reports.