The firebrand tweeted about Texas and guns after Sunday's mass shooting.
The protest comes days after their team's owner called them "inmates."
He later apologized, saying it was just a "figure of speech."
"All I want to do is be out there on that field for my teammates and this city," he wrote in an emotional tweet Monday.
The quarterback shows the team's "cafeteria ladies" that he won't leave them with a loss.
In less than three weeks, the NFL defensive end's crowdfunding campaign grew beyond $37 million.
Bill Clinton, Barack Obama, George H.W. Bush, George W. Bush and Jimmy Carter come together for the One America Appeal.