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Tony Romo played what I was calling the best football of his career for two quarters and one drive, and then it all fell apart.
He started the game 23 of 28 for 234 yards and three touchdowns.
He ended it 31 for 37 with 331 yards, three touchdowns and three back-breaking interceptions.
Romo was flat out masterful for two quarters and two and a half minutes.
He was carving the Lions' secondary to pieces.
In fact, his performance was eerily reminiscent of what he did to the New York Jets in Week 1 before all hell started to break loose in that game.
Romo was controlling the entire flow of the game in the first half.
He was getting the Cowboys in and out of the huddle extremely quickly, freeing him to change the play at the line of scrimmage—which he did multiple times in the first half.
On the Cowboys' first drive of the game, Romo checked from a pass to a run on 2nd and 13, which led to a Tashard Choice nine yard run.
Romo hit Dez Bryant to go up 7-0 on the next play.
He did an expert job of varying his snap count in the first half as well.
He had the Cowboys snapping the ball on two throughout much of the first half, and was later able to draw the Lions offside by going on three late in the first half and catch them off guard by snapping on one soon after.
Romo led another great drive to open the second half, working to Laurent Robinson to get right down the field and then finding Jason Witten in the back of the end zone for six points.
And then, everything started to fall apart.
Quite simply, it was the worst half of football I've ever seen Romo play.
With your team up 27-3, you simply cannot turn the ball over and let the opposition back in the game.
You should not be forcing throws into tight spaces when you don't need to.
Romo did everything wrong in the second half, there's no way around it.
He handed the game to the Lions, much like he handed the game to the Jets in Week 1.
Romo threw a momentum-changing interception to his good friend Bobby Carpenter to give the Lions some life.
Then, just when it looked like the Cowboys were going to score and put the game away again, Romo made another inexcusable throw and got picked for six by Chris Houston.
On their next drive, Romo missed a man in the end zone on second and goal which could have put them back up by 17. Instead, the Cowboys settled for a field goal and a 13-point lead.
Romo had two big miscommunications with his favorite target Witten, leading to an incomplete pass and his final interception.
With the Cowboys still leading by three, there was no reason to attempt to throw over two defenders to Witten off of his back foot.
It's an absolutely horrible play, and it cost the Cowboys the football game.
Romo looked like he may have been able to redeem himself by quickly moving the Cowboys down the field on their last drive of the game, but it was to no avail as he wound up taking a terrible sack on third down and then checking down to Felix Jones in the flat on fourth and 20.
This was Romo's worst performance in a long time.