Jay Glazer reported on his Twitter page that Eagles quarterback Donovan McNabb will miss this Sunday’s game against the Saints with a fractured rib. After that, it’s unclear how long he’ll be out.

Philadelphia will likely start Kevin Kolb under center this week, although rumor has it that the team might re-sign A.J. Feeley to compete with Kolb in practice. Either way, the Eagles will suffer a downgrade at quarterback.

The Eagles are a Super Bowl contender this year, but not without McNabb. Kolb has struggled in the brief opportunities he’s recieved over the past couple years and it’s looking more and more that the former second rounder was a bust pick for Philly.

Of course, if McNabb misses an extended period of time and Kolb struggles, Michael Vick comes off his suspension in Week 4 and could start. But chances are that Andy Reid would stick with Kolb for as long as he can, seeing as how Vick hasn’t played in two years outside of a couple preseason games.

This will be an interesting situation to watch develop over the next couple weeks.

The Eagles thumped the Panthers 38-10 on Sunday in Charlotte, but their mood went from jubilation to concern after quarterback Donovan McNabb suffered a rib injury after rushing for a touchdown in the third quarter.

McNabb was able to walk off the field under his own power, but he was clearly in discomfort when he returned to the sidelines in the fourth quarter. The Eagles haven’t announced how long McNabb will be out for, or if he’ll be out at all.

What’s interesting about this injury is that Philadelphia’s backup quarterback is Michael Vick, who won’t be available until Week 4 until after he’s done serving a three-game suspension. Kevin Kolb will start next week if McNabb can’t play.

Even though Vick brings an added dimension to the field as a runner, him starting would be a worst-case scenario for the Eagles. Philadelphia is a serious Super Bowl contender and need McNabb (who is the far superior passer to Vick) under center. Outside of a couple of preseason games, Vick hasn’t played in two years and would need time to shake off the rust following his suspension.

But maybe this is all a moot point. McNabb might not miss any time and even if he does, Kolb is going to get the chance to start while Vick is out. If he plays well, it’s highly doubtful that Andy Reid would turn the keys of the offense over to Vick.

As for the Eagles’ opponents on Sunday, this was a worst-case scenario for a Panthers team that was hoping to put their disastrous performance against the Cardinals in last year’s divisional round of the playoffs behind them.

Quarterback Jake Delhomme had another awful performance while completing just 7 of 17 pass attempts for 73 yards and four interceptions. Why Carolina refuses to develop a young signal caller behind Delhomme is beyond me. If his performance on Sunday was any indication of how he’ll do the rest of the year, then the Panthers are in serious trouble.

Update: ESPN.com is reporting that McNabb fractured a rib, but Reid stated that the quarterback might still play next week.