FILE - In this Dec. 22, 2018, file photo, Washington Redskins running back Adrian Peterson (26) stands for the national anthem before an NFL football game against the Tennessee Titans in Nashville, Tenn. NFL players who want to kneel during the national anthem to protest police brutality and racism have far more support than Colin Kaepernick did four years ago. (AP Photo/Mark Zaleski, File)

FILE - In this Sept. 12, 2016, file photo, San Francisco 49ers safety Eric Reid (35) and quarterback Colin Kaepernick (7) kneel during the national anthem before an NFL football game against the Los Angeles Rams in Santa Clara, Calif. When Colin Kaepernick took a knee during the national anthem to take a stand against police brutality, racial injustice and social inequality, he was vilified by people who considered it an offense against the country, the flag and the military. Nearly four years later, it seems more people are starting to side with Kaepernick’s peaceful protest and now are calling out those who don’t understand the intent behind his action. (AP Photo/Marcio Jose Sanchez, File)

FILE - In this Dec. 2, 2018, file photo, Carolina Panthers strong safety Eric Reid (25) kneels during the playing of the National Anthem before an NFL football game against the Tampa Bay Buccaneers in Tampa, Fla. NFL players who want to kneel during the national anthem to protest police brutality and racism have far more support than Colin Kaepernick did four years ago. (AP Photo/Mark LoMoglio, File)

FILE - In this Dec. 15, 2019, file photo, Houston Texans wide receiver Kenny Stills (12) kneels during the national anthem before an NFL football game between the Texans and the Tennessee Titans in Nashville, Tenn. NFL players who want to kneel during the national anthem to protest police brutality and racism have far more support than Colin Kaepernick did four years ago. (AP Photo/Mark Zaleski, File)