Thurmond plans to retire before the upcoming season, ESPN's Adam Schefter reports.
Capable of playing throughout the defensive backfield, Thurmond teamed with Malcolm Jenkins to give the Eagles a top safety duo in 2015. Only 28 years old and arguably the top defensive free agent still available on the market, Thurmond is presumably retiring due to concerns about his long-term health. He played all 16 games last season, but made just 22 regular-season appearances from 2011 to 2014, primarily limited by a slew of lower-body injuries.