Rapid Reaction: Bears 27, Lions 23

Posted by ESPN.com's Kevin Seifert Chicago emerged Sunday with sole possession of first place in the NFC North.

But at what price?

The Bears lost quarterback Kyle Orton (ankle) and safety Mike Brown (calf) to injury during their comeback victory over Detroit, a hefty toll in what should have been an event-free cakewalk.

Early indications are that Brown's injury is not serious, but the severity of Orton's ankle injury is unknown. Orton has played the single biggest role in the Bears' 5-3 record this season, and it would be difficult to exaggerate how impactful a long-term injury would be.

Rex Grossman rallied the Bears against Detroit. But how would he fare against stiffer competition -- starting next week against unbeaten Tennessee? The best guess is you would see much more of tailback Matt Forte, who produced his second 100-yard game of the season Sunday.

The Lions, meanwhile, are left to sort out their quarterback situation after Dan Orlovsky's best start of the season. On the day his team confirmed the signing of quarterback Daunte Culpepper, Orlovsky threw for 292 yards and found receiver Calvin Johnson eight times. You would assume Orlovsky will start next week against Jacksonville, but beyond then is anyone's guess.