BOSTON (CBS) — Sunday afternoon had gotten off to a good start for Patriots rookie running back Sony Michel. But that changed in an instant.

Michel took a handoff early in the second quarter, on the third play of the Patriots’ third drive of the game, and he ran to the left side of the line. He was met there by defensive tackle Bilal Nichols, who wrapped up Michel and twisted the running back down to the field.

Michel fumbled immediately, and the Bears recovered. While that was troubling for the Patriots in and of itself, it was compounded by Michel staying down on the turf.

Soon after, the Patriots reported it as a knee injury. He needed help from the trainers to get off the field, with a number of players from both teams tapping Michel’s helmet as he made his way to the sideline.

Michel was then carted to the locker room. He was initially listed as questionable to return, but he was downgraded to “out” after halftime.

“Yeah, I saw him. I just wish for a speedy recovery for him,” fellow running back James White said after the 38-31 win. “Whatever it happens to be, I’m not sure. He’ll attack it, whatever it happens to be.”

“Losing Sony was tough. We all hope he’s OK,” Tom Brady said. “He’s doing a great job for us.”

Michel had rushed for 22 yards on four carries and he caught one pass for 13 yards prior to suffering the injury.

This post will be updated when information becomes available…