NFL says 'Football is gay. Football is queer. Football is accepting.'
Fair Play: How LGBT Athletes Are Claiming Their Rightful Place in Sports: 9781617754470: Zeigler, Cyd: Books
Carl Nassib Becomes First NFL Player to Come Out As Gay - The New York Times
Over 160 LGBTQ athletes will compete at Olympics, setting global record
All-American Michael Sam Comes Out and the NFL Is On the Clock
Carl Nassib, NFL's first out gay player, announces retirement
10 NFL Stars Who've Come Out as Gay or Bisexual
Carl Nassib comes out as gay, first NFL player to do so - The Washington Post
A Reality Series About Gay Flag Football Players Is Coming to TV
Ex-Dallas Cowboy Jeff Rohrer to wed same-sex partner - BBC News