Defensive back Walter Thurmond, who had a productive year with the Eagles in 2015 in his first season as a safety, is retiring at 28, a league source confirmed to CSNPhilly.com's Dave Zangaro.

The news of Thurmond's retirement was initially reported by ESPN's Adam Schefter.

Thurmond was finally able to stay healthy in 2015. He played 16 games for the first time in his career, finishing with 71 tackles, three interceptions, two sacks and two forced fumbles. Thurmond and Malcolm Jenkins formed one of the NFL's better safety duos, but the Eagles upgraded the position even more by signing Rodney McLeod to a five-year deal.

Thurmond battled injuries throughout his six-year NFL career, missing 44 of 80 games over his first five seasons. A broken fibula cost him most of the 2011 season, he missed significant time in 2012 with a hamstring injury, and a torn pectoral limited him to two games in 2014.