The Dallas Cowboys received a scare during the third quarter of their 20-17 loss to the Washington Redskins on Monday night at AT&T Stadium when Redskins linebacker Keenan Robinson sacked Tony Romo, kneeing the quarterback in his surgically repaired back. 

Romo was able to walk off the field on his own power, and X-rays were negatives. However, Romo will undergo an MRI on his bruised back. Head coach Jason Garrett said that Romo has a back contusion. 

The Redskins owned a 10-7 lead when Romo exited the game. He had completed 13 passes on 21 attempts for 183 yards and one touchdown.

Brandon Weeden filled in admirably for Romo, completing four of his six pass attempts, including a 25-yard-touchdown strike to tight end Jason Witten with 9:27 remaining.

But with 5:39 remaining, Romo was seen in the locker room with his helmet on, and speaking with the team’s medical staff. Moments later he returned to the sideline.

The drama would continue minutes later. With 1:52 remaining, and with the score 17-17, Romo returned to action with Dallas working from inside their 10 yard line. After handing off to DeMarco Murray, who rushed for nine yards, Romo was sacked on his second play by defensive back Brandon Meriweather, who forced a fumble. The Cowboys recovered, and Romo would later complete an 18-yard pass to Terrence Williams to keep the Cowboys' hopes alive.

The drive would ultimately fall short. In overtime, Redskins quarterback Colt McCoy would calmly lead Washington on a 58-yard drive to set up a Kai Forbath field goal to overshadow Romo's dramatic return.

"Even if I hadn't had back surgery, I probably would have felt that one pretty good," said Romo, about the third-quarter sack.

Losing Romo could be a major setback for the Cowboys, who began the Monday night contest with the best record in the NFL. Romo entered the matchup as the No. 6 passer rater (104.7) in the NFL.