Sean Lee retired Monday after the linebacker spent all of his 11 mostly injury-plagued seasons with the Dallas Cowboys.

The 34-year-old said in a letter released by the club that it was “my time to walk away.” Lee is eighth in team history with 995 tackles.

A second-round pick out of Penn State in 2010, Lee led all NFL linebackers in interceptions through his first six seasons with 12, despite missing all of 2014 after tearing a knee ligament in the first offseason practice.

Lee is fourth among Dallas linebackers with 14 interceptions and holds the club record for tackles in a game with 22 against the New York Giants in 2016, his only All-Pro season.

Injuries ending up defining Lee’s career. He missed the final 10 games of 2012 with a toe injury and five of the final six games the next year with hamstring and neck issues before the season-ending knee injury in the 2014 offseason.

The only years in which Lee didn’t miss at least one game with injuries were 2016, when the two-time Pro Bowler helped the Cowboys reach the divisional round of the playoffs, and 2019. Hamstring injuries sidelined Lee frequently later in his career.

By his final season, Lee had a secondary role behind the young leaders of the linebacking group, Leighton Vander Esch and Jaylon Smith. The Cowboys went 6-10 in coach Mike McCarthy’s first season, missing the playoffs for the third time in four years.