This weekend President Trump tweeted about the mayor of Puerto Rico and questioned her leadership skills during the hurricane relief efforts.
Many felt that Trump's comments were unfounded and tone-deaf.
There has been no word from Lynch as to what inspired him to wear the controversial T-shirt ahead of the game against the Broncos.
Going into their week 4 game against Denver Lynch leads the Raiders with a mere 139 yards and a touchdown on three dozen carries but brings more than just numbers to his hometown team, namely a tone-setting physicality and personality.
"He's been a great addition," Raiders Coach Jack Del Rio said, noting he brings "passion and toughness" to a roster that prides itself on nastiness.
"Oh, you've just got to get him on the ground," said Denver linebacker Von Miller, laughing because that's not so easy. "I remember one time when I tried to tackle him (when he was with) the Seattle Seahawks and I had him behind the line. It was like a yard. I think I had him by one leg and he just drug me for the next two and got the first down. Usually when you get a running back he'll just fall, but he's definitely 'Beast Mode.' They call him that for a reason."
The Associated Press contributed to this report.