Colin Kaepernick (right) and Eric Reid of the San Francisco 49ers kneel in protest during the national anthem on September 12, 2016, in Santa Clara, California.
Colin Kaepernick (right) and Eric Reid of the San Francisco 49ers kneel in protest during the national anthem on September 12, 2016, in Santa Clara, California.
Thearon W. Henderson/Getty Images
Seattle Seahawks' Jeremy Lane sits as the national anthem plays before a preseason match against the Oakland Raiders on September 1, 2016, in Oakland.
Seattle Seahawks' Jeremy Lane sits as the national anthem plays before a preseason match against the Oakland Raiders on September 1, 2016, in Oakland.
Tony Avelar/AP
Kenny Britt and Robert Quinn of the Los Angeles Rams raise their fists prior to playing the San Francisco 49ers on September 12, 2016, in Santa Clara.
Kenny Britt and Robert Quinn of the Los Angeles Rams raise their fists prior to playing the San Francisco 49ers on September 12, 2016, in Santa Clara.
Ezra Shaw/Getty Images
Denver Broncos' Brandon Marshall kneels on the sideline during the national anthem before a game against the Carolina Panthers in Denver on September 8, 2016.
Denver Broncos' Brandon Marshall kneels on the sideline during the national anthem before a game against the Carolina Panthers in Denver on September 8, 2016.
Joe Mahoney/AP
From left, Miami Dolphins' Jelani Jenkins, Arian Foster, Michael Thomas and Kenny Stills kneel during the singing of the national anthem before a game against the Seattle Seahawks on September 11, 2016.
From left, Miami Dolphins' Jelani Jenkins, Arian Foster, Michael Thomas and Kenny Stills kneel during the singing of the national anthem before a game against the Seattle Seahawks on September 11, 2016.
Stephen Brashear/AP