Professional Athletes Who Identify As LGBTQ+ and Proud
A People's History of LGBTI Olympians
In NFL's 100 years, no openly gay player has appeared in a regular-season game - The Boston Globe
Timeline: Michael Sam and 40 years of LGBT rights in sports
Dave Kopay shocked the sports world in 1975
LGBTQ sports pioneer Dave Kopay inspired many athletes to come out - Outsports
40th Anniversary History Series - Federation of Gay Games
How Howard Bragman Orchestrated Michael Sam's Coming Out
There have been 11 known gay players in NFL history - Outsports