Percy Harvin wants to return to NFL after four year absence – NSS
Former Bills wide receiver Percy Harvin has 'itch' to play again
Percy Harvin - Buffalo Bills Wide Receiver - ESPN
Buffalo Bills sign WR Percy Harvin out of retirement
Percy Harvin looking to resurrect career with Bills
Percy Harvin Retires After Seven Seasons in the League - The New York Times
Huddle Up: Percy Harvin, Vikings may be stuck with each other - Sports Illustrated