Baltimore Ravens linebacker Zach Orr, the team's leading tackler this season, will announce his retirement Friday, a source confirmed to ESPN's Jamison Hensley.
The 24-year-old Orr, who also had three interceptions this season, was placed on injured reserve after suffering a stinger in his neck against the Pittsburgh Steelers on Dec. 25.
His retirement was first reported by the NFL Network.
Orr, a first-time starter after entering training camp as a backup, finished the season with 132 combined tackles.
The third-year player, who is the son of former Redskins tight end Terry Orr, was set to be a restricted free agent this year and was in line to get a tender over $2 million in 2017.