Marshawn Lynch arrived for his game with the Oakland Raiders on Sunday in a shirt that read "Everybody vs. Trump."
Sports reporter Darren Rovell shared a photo of Lynch arriving in the shirt.
Last Sunday marked a wave of NFL protests during the national anthem.
President Donald Trump's comments about owners firing players who kneel during the national anthem sparked a mass increase in the protests -- as more than 130 players sat, knelt or raised their fists in defiance during early games.
The week before, just four players didn't stand and two raised their fists.
"Wouldn't you love to see one of these NFL owners, when somebody disrespects our flag, you'd say, 'Get that son of a bitch off the field right now. Out! He's fired,'" Trump said to loud applause at a rally in Huntsville, Alabama.
"If NFL fans refuse to go to games until players stop disrespecting our Flag & Country, you will see change take place fast. Fire or suspend!" Trump said the next day in a tweet.
Trump also mocked the league's crackdown on illegal hits, suggesting the league had softened because of its safety initiatives, which stem from an increased awareness of the devastating effects of repeated hits to the head.
After the comments, before their game against the Tennessee Titans, the Seattle Seahawks decided to stay in the locker room during the national anthem.
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- President's criticisms spark more protests at NFL games
- Seahawks president Peter McLoughlin responds to Trump's condemnation of anthem protest
- Seahawks players respond to Trump's condemnation of anthem protest
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