Before Carl Nassib, Michael Sam was the NFL's first openly gay draft pick - The Washington Post
Michael Sam: I'm Determined to Be Great
Carl Nassib: NFL supports first openly gay active player. Will more athletes come out?
Michael Sam Has a Spot in History, if Not With the Rams - The New York Times
Michael Sam Drafted by the Rams, First Openly Gay NFL Player!, Michael Sam
Luckiest Guy' Nassib, NFL's First Openly Gay Player, Retires
Michael Sam invited to first-year NFL veterans' combine, Sports
2014 NFL draft -- Michael Sam drafted by St. Louis Rams in seventh round - ESPN
Michael Sam Talks Hardships, Being Dropped By NFL After Coming Out
NFL: Sam becomes first openly gay player drafted into NFL