Cam Newton appears to be dealing with a new injury.

Jim McBride of the Boston Globe reports that Newton stopped participating in the New England Patriots’ organized team activity practice after experiencing discomfort in his right hand. It’s unclear what caused Newton’s hand issue.

McBride offered details of what he saw on the practice field:

Newton grabbed a ball and gripped it before slowly walking back to the drill area while flexing his hand and checking for swelling. He took a knee to watch the other quarterbacks before checking in with offensive coordinator Josh McDaniels. They both smiled at the end of the conversation, though Newton didn’t throw another pass the rest of the afternoon.

McBride noted that owner Robert Kraft, coach Bill Belichick and receiver Nelson Agholor checked on Newton during the practice.

“He’s still around,” Agholor told reporters. “He still talks to the wide receivers. Talks to his teammates. You feel him. You still feel him, man. That’s why he’s a great teammate.”

In Newton’s absence, veteran backup Bryan Hoyer led the way. Jarrett Stidham and Mac Jones also threw in drills.