The first-team offense didn't look good at all. Tony Romo went 10-of-18 for 87 yards while constantly having pressure in his face. The offensive line did a poor job all night—they couldn't get much push in the run game and allowed far too many pressures on the quarterback.
Romo was sacked three times and was continually forced to maneuver in the pocket to avoid defenders. The one positive from the first-team offense is that Romo and Dez Bryant are clearly on the same page and should have a fantastic year together.
The first-team defense did a poor job against the run; repeatedly getting gashed by Dolphins running backs. However, they did a great job in the red zone, and they got a timely turnover.
The Cowboys have to do a better job against the run, especially because their first game is against a run-based team in the San Francisco 49ers.
The biggest improvement from the Ravens game was the play on special teams. After getting gashed frequently, the special teams did a better job in coverage and even got some decent returns from the likes of Dwayne Harris.
The mistakes the Cowboys made throughout the game are fixable, but they are running out of time to fix them.
With that said, here are the grades for each positional unit on America's Team.