6 : 25 p.m. DENVER -- Broncos linebacker Brandon Marshall took to a knee during the playing of the national anthem before Denver 's season opener against Carolina .
Broncos linebacker Brandon Marshall is a college teammate of Colin Kaepernick at UNR .
6 : 25 p.m. DENVER -- Broncos linebacker Brandon Marshall , a college teammate of Colin Kaepernick at UNR , took to a knee during the playing of the national anthem before Denver 's season opener against Carolina .