From Sports Illustrated:
By Chris Chavez November 19, 2017
Oakland Raiders running back Marshawn Lynch sat during the Star-Spangled Banner but then stood up for Mexico’s national anthem before Sunday afternoon’s game against the New England Patriots in Mexico City.
Marshawn “Beast Mode” Lynch’s Raider’s lost 33-8. I’m guessing that the Patriots’ Tom Brady stood respectfully during the playing of both anthems.