Reed spent 11 years in Baltimore before splitting the 2013 season with the New York Jets and Houston Texans. He said in June 2014 that he was not yet retiring and felt he could still play, but never ended up playing last season.
The 36-year-old will hold a press conference at 2 p.m. ET Thursday to announce his retirement, which will be attended by Ravens coaches and former teammates, the team said.
Reed retires as a nine-time Pro Bowler and eight-time All-Pro. In his final year in Baltimore the Ravens won Super Bowl XLVII.
For his career, Reed finishes with 643 tackles, 64 interceptions, 141 passes defended and 11 forced fumbles. He started 169 games over his 12-year NFL career.
- Molly Geary