Colts sign Nasir Adderley 3 years after then-Chargers safety retired from NFL at 25 years old Adderley announced on Instagram in February that he's attempting an NFL comeback. Content Original Link: https://sports.yahoo.com/nfl/article/colts-sign-nasir-adderley-3-years-after-then-chargers-safety-retired-from-nfl-at-25-years-old-211635120.html