GREEN BAY, Wis. -- The play that knocked Chicago Bears quarterback Brian Hoyer from last week's game at Green Bay cost Packers outside linebacker Clay Matthews $18,231.

The NFL fined Matthews for leading with the crown of his helmet on the hit. Hoyer sustained a broken left arm and was placed on injured reserve after undergoing surgery.

His recovery is expected to be 6-8 weeks.

Bears quarterback Brian Hoyer broke his left arm while taking a hard hit from Packers linebacker Clay Matthews. Hoyer was replaced by Matt Barkley. Stacy Revere/Getty Images

Matthews combined with Julius Peppers to hit Hoyer in the second quarter of the Packers' 26-10 win at Lambeau Field. Neither was penalized on the play.

Matt Barkley finished the game for the Bears. Opening-day starter Jay Cutler has been cleared to play for the first time since his Week 2 thumb injury.

It's the first time Matthews has been fined this season. He was fined $17,363 last season for a hit on quarterback Nick Foles in a game against the Rams.