NFL star Carl Nassib is making tackles and history
Is Carl Nassib Retiring From Football?
32 Football Players Who Came Out of the Closet
14 NFL Pro Bowlers say they would welcome a gay teammate - Outsports
List of LGBT sportspeople - Wikipedia
Homosexuality in American football - Wikipedia
espnW -- Michael Sam's announcement that he is gay underscores how LGBT change in pro sports will be gradual - ESPN
32 Football Players Who Came Out of the Closet
Kevin Maxen becomes first male coach in a US men's professional - KAKE
NHL players gearing up to use Pride Tape despite league ban? - Outsports
NFL says: 'Football is Gay. Lesbian. Queer. Transgender. Accepting.' - Outsports