Tony Romo will undergo an MRI on his back, which was in pain after the Dallas Cowboys' last-minute win over the Washington Redskins.

"I tweaked it in the game," Romo said, per the Cowboys' official website. "For whatever reason, just the twist or whatever that was, definitely just made it not feel comfortable."

"We think it'll be OK, but it was a tightening --  it wasn't a contusion," Jerry Jones said. "It was a little tight, but they're working on him and we'll work on that all week. He really had a little of it in practice, to give you an idea, this past week -- just a little tightness."