Dallas Cowboys center Phil Costa left Sunday's game with an ankle injury and was carted off with an aircast on his right leg. Latest updates from Carolina indicate that X-rays were negative, and that the injury is now believed to be a severe sprain or a dislocation.
If the injury is deemed to be a sprain, it's one that traditionally results in a player missing 2-3 weeks; a dislocation, however, can be far worse, with players being absent for as many as 6-8 weeks. There have been no further updates at this time, and it's likely more information wont be released until post-game, or possibly Monday.
In his absence, Ryan Cook has been the starting center, and with the exception of a few bad snaps, has been playing well for the Cowboys. The former Miami Dolphin was traded for in the off-season to help solidify the interior line, and with Costa's injury, it appears to have been a wise decision.