Linebacker A.J. Klein retires after 11 seasons in NFL

(Photo credit: Kirby Leei-USA TODAY Sports)

Former Buffalo Bills linebacker A.J. Klein announced his retirement on Tuesday, his 33rd birthday.

Klein played 11 NFL seasons with the Carolina Panthers (2013-16), New Orleans Saints (2017-19), Chicago Bears (2022), Baltimore Ravens (2022) and Bills (2020-21, 2022-23), with whom his contract expired in January.

He started 82 of 146 games and totaled 465 tackles, 15.5 sacks, 4