FILE - In this Nov. 16, 2019, file photo, free agent quarterback Colin Kaepernick arrives for a workout for NFL football scouts and media in Riverdale, Ga. Kaepernick has been a leader in the fight for social justice by people of color not just in the football world or the sports world. Recent developments have raised his profile and, more significantly, reminded many of the sacrifices he has made while protesting social injustice and police brutality.(AP Photo/Todd Kirkland, File)

FILE - In this Oct. 11, 2018, file photo, former NFL football quarterback Colin Kaepernick attends the W.E.B. Du Bois Medal ceremonies at Harvard University in Cambridge, Mass. Recent societal events, including of course the death of George Floyd, appear to be leading to major changes on the sports front. The kind of changes Kaepernick sought four years ago when he began kneeling. (AP Photo/Steven Senne, File)

FILE - In this Sept. 25, 2016, file photo, San Francisco 49ers' Colin Kaepernick kneels during the national anthem before an NFL football game against the Seattle Seahawks in Seattle. His peaceful demonstrations of kneeling during the national anthem were misconstrued by many as being un-American, as representing protests against the flag and “The Star-Spangled Banner.” While becoming a standard bearer _ even a hero _ for those facing such oppression, he became a pariah to NFL team owners. It has cost him three years of his football playing career. Prime years. (AP Photo/Ted S. Warren, File)