Chicago Bears quarterback Brian Hoyer is undergoing surgery on his broken left arm Sunday and will miss at least eight weeks, a source told ESPN's Adam Caplan.

Hoyer could be placed on injured reserve.

He suffered the injury in the second quarter of Thursday night's 26-10 loss to the Green Bay Packers. Hoyer was hit hard by Green Bay defenders Julius Peppers and Clay Matthews on a third-down pass attempt that fell incomplete with 10:03 left in the quarter.