Aaron Rogers, quarterback for the Green Bay Packers, left during the first series on Monday Night Football with NFL insiders warning Rogers could miss the rest of the regular season.
Rodgers left the game with the injury to his left shoulder after being sacked by Chicago bears defensive end Shea McClellin.
"They want to run more tests," Packers coach Mike McCarthy said after the game. "An exact diagnosis has not been given. No timeline."
With Rogers out and the Packers offense sputtering under backup Seneca Wallace the Bears were able to put pressure on the Packers defense who could not come up with a response. The Bears were able to tally 442 yards of offense and win in Green Bay for the first time since 2007.
"Defensively, we didn't do a very good job stopping the run," McCarthy said. "We had a lot of missed tackles and the passing game ... the way the fourth quarter went, disappointing…Tough loss. Hate to lose at home. Division game."
The loss is concerning for the Packers, but Green Bay's main worry at this juncture is Rodgers' status.
"I don't like it when anybody gets hurt," said general manager Ted Thompson. "But it's all part of the game."
The Bears did get off to an extremely fast start to the season but have since cooled off, but with their win on Monday night put them in a three way tie at the top of the NFC North with Green Bay, Detroit and Chicago all being on 5-3.
The Bears have had one of the best offenses in the league so far this season, and are ranked number 2 in points scored per game (30.4 points). They have Jay Cutler to thank for a lot of that good work, and he is 146 of 225 for 1,658 yards and 12 touchdowns.
Before Monday night's game Bears running back Matt Forte was also running the football effectively rushing for 533 yards on 116 carries and 6 touchdowns so far this season.