Green Bay Packers quarterback Aaron Rodgers suffered a broken right collarbone during Sunday's game against the Minnesota Vikings.
The Packers said in a tweet that there was a chance Rodgers could miss the rest of the season.
Rodgers suffered the injury in the first quarter after taking a hard hit from Vikings linebacker Anthony Barr. Rodgers, rolling out to the right on a second-and-9 play from the Green Bay 39, was hit by Barr after releasing a pass that fell incomplete.
The quarterback appeared to land on his throwing arm and laid on the turf for several seconds before trainers attended to him. He left the field under his own power and exchanged words with members of the Minnesota defense on his way to the sideline. There was no penalty called on the play.
After a brief examination on the sideline, Rodgers was taken down the tunnel on a cart. He was replaced by third-year pro Brett Hundley.
Rodgers was 2-for-4 passing for 18 yards with no touchdowns or interceptions on Sunday. He has thrown 13 touchdown passes and three interceptions this season.