Cowboys QB Tony Romo out for Week 17 vs. Eagles - KFDA - NewsChannel 10 / Amarillo News, Weather, Sports

Cowboys QB Tony Romo out for Week 17 vs. Eagles

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AP photo - Evan Vucci AP photo - Evan Vucci

CBS Sports - If the Dallas Cowboys are going to win the NFC East title, they're going have to do it without Tony Romo.

Romo aggravated a prior back injury against Washington and that injury will keep him from playing against Philadelphia in the Cowboys regular season finale on Sunday, according to multiple reports.

A high-ranking Cowboys official told CBS Sports NFL Insider Jason La Canfora that "It's looking that way" as far as Romo being out for the Eagles game. However, the team hasn't made a final determination.

After the Cowboys 24-23 win over the Redskins, Romo acknowledged that he injured the back, but he said it was just a 'tweak.' "I tweaked it in the game and then for whatever reason then, the twist or whatever it was, definitely just made it not feel comfortable," Romo said.

Cowboys owner Jerry Jones also commented on Romo's back injury on Sunday, saying that the back injury was anything new and that Romo had actually aggravated a prior injury.

Romo threw a 10-yard touchdown pass on fourth-and-goal with under 90 seconds left against the Redskins on Sunday to give the Cowboys a dramatic win and keep their playoff hopes alive. The Dallas win setup a Week 17 showdown against Philadelphia in a de facto NFC East championship game.

The winner of Sunday night's game will win the division title and head for the playoffs. The loser will be done until September 2014.

With Romo out, that means backup quarterback Kyle Orton will get the start for the Cowboys. Orton has only thrown five passes this season and hasn't started a game since 2011. Coincidentally, Orton's last game as a starter also came in a regular season finale. In the final week of the 2011 season, Orton led the Chiefs to a 7-3 win over the Broncos.

Since Romo became the Cowboys full-time starter in 2006, Dallas is 6-7 in games that he didn't play in.

The Cowboys will also be without linebacker Sean Lee, who will miss his second straight game with a neck injury.