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," 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 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."
Lynch presents another big test for Denver's defense, which is allowing a league-low 59 yards rushing and has yet to yield a touchdown run. That's a turnaround from last season when the Broncos were 28th in the league and allowed the Raiders to rush for 218 yards in Oakland.
The Associated Press contributed to this report.