Donald Trump on Monday added Marshawn Lynch to the list of sports figures he has criticized on Twitter.

Lynch has been regularly sitting during the national anthem this season and did so again when his Raiders played the Patriots in Mexico City on Sunday. Lynch then stood, though not at attention, during the playing of the Mexican anthem.

Trump’s first tweet of the day Monday took Lynch and the N.F.L. to task: “Marshawn Lynch of the NFL’s Oakland Raiders stands for the Mexican Anthem and sits down to boos for our National Anthem. Great disrespect! Next time NFL should suspend him for remainder of season. Attendance and ratings way down.”