There have been 11 known gay players in NFL history - Outsports
Raiders lineman Carl Nassib comes out as gay - Outsports
NFL star Carl Nassib is making tackles and history
The Surprisingly Long History of Gays in Pro Football
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Out NFL star Carl Nassib is dating former Olympian Soren Dahl
NFL Declares 'Football Is Gay' in New Video
Homosexuality in American football - Wikipedia
Meet the 16 out gay and bi players in NFL history - Outsports
10 NFL Stars Who've Come Out as Gay or Bisexual