With their 30-24 win over the San Francisco 49ers on Sunday, the Green Bay Packers leapt back into the playoff hunt in the NFC. But unfortunately for them, they may be without two defensive starters for the rest of the season.

According to beat writer Greg Bedard, outside linebacker Aaron Kampman and cornerback Al Harris have torn ACLs and both will likely miss the remainder of the 2009 season.

At 35, Harris’ could be a career-ender. He was carted off the field Sunday and couldn’t walk in the locker room, and chances are he’ll need reconstructive surgery to repair the damage. Tramon Williams will start at right corner in Harris’ place.

Kampman was in the midst of having a horrible season while trying to convert from defensive end to outside linebacker. Given that he’s a free agent at the end of the year, it’s doubtful that Green Bay will re-sign Kampman. And even if the team had interest, it’s more doubtful that he’d even be interested in coming back to play outside linebacker. He just isn’t a fit for the 3-4.

Save for a brutal effort against Tampa three weeks ago, Green Bay’s defense had been playing well over the past month. Given how poorly Kampman was playing, the Packers defense might not suffer much in the long haul. But it remains to be seen how Williams will hold up when teams start attacking his side of the field more frequently.

As for the game, the Packers held off a late 49ers’ rally to secure victory. Green Bay jumped out to a 30-10 fourth quarter lead, but Alex Smith hit Vernon Davis on a 24-yard touchdown pass with 10:37 remaining to cut the Packers’ lad to 30-17, then running back Frank Gore hauled in a 10-yard touchdown pass with 5:56 to make it a 30-24 game.

Quarterback Aaron Rodgers had an outstanding game, throwing for 344 yards on 32-of-45 passing and two touchdowns. Ryan Grant rushed for 129 yards and a touchdown on 21 carries.

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Teams never assume victory before they play the game (or at least they shouldn’t), but the Steelers must have felt great heading to Kansas City this weekend. After all, the Chiefs have struggled offensively all season and their top playmaker, Dwayne Bowe, was suspended four games earlier in the week.

But not only did Pittsburgh suffer defeat on Sunday, but they’re key offensive player also suffered an injury.

Ben Roethlisberger suffered a head injury in overtime of the Steelers’ 27-24 loss to the Chiefs in Week 11. Big Ben caught a knee to the head on a diving scramble and lay on the ground for several minutes before walking off under his own power. He finished 32-of-42 for 398 yards with three touchdowns and two interceptions.

Roethlisberger shredded Kansas City’s secondary the entire game, but three turnovers and one big play by Chiefs’ wideout Chris Chambers (four catches, 119 yards) doomed the Steelers in the end. Chambers’ 61-yard reception in overtime set up Ryan Syccop’s 22-yard game-winning field goal.

This loss hurts the Steelers on many levels. Not only did they suffer defeat in a game everyone assumed that they would win, but once the Bengals beat the Raiders in Oakland later today, Pittsburgh will also essentially fall three games back in the AFC North. It’s never easy to fly cross-country and play on the road just one week after suffering a tough divisional loss. But this was a game Pittsburgh needed to win.

It’ll be interesting to see if Big Ben misses any time. He’s a tough player, so one would assume that he’ll play next week but head injuries are always a little trickier to deal with.

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