Baltimore Ravens defensive coordinator Dean Pees informed the team that he is retiring.
Linebacker C.J. Mosley posted the news on Twitter while NFL Network Insider Ian Rapoport reported on Monday that Pees will retire effective March 1.
The 68-year-old Pees has served on coach John Harbaugh's staff since 2010, working as linebackers coach before being elevated to defensive coordinator after Chuck Pagano departed to become the head coach of the Indianapolis Colts in 2012.
Pees helped guide the Ravens to a victory in Super Bowl XLVII and won two rings while working with New England Patriots from 2004-09. Pees spent most of the early part of his career in college, including as head coach at Kent State from 1998-2003.
"His fingerprints are all across this defense," corner Bandon Carr said Sunday, per the Baltimore Sun. "Just the years that he's been here, you've seen the shutouts and big-game defenses that we've had from his play-calling."
Defensive tackle Brandon Williams took it a step further.
"All I can say is I appreciate him. He's the best defensive coordinator I've ever been around," Williams said. "From his resume alone, he's a top defensive coordinator."