You remember that the score doesn't matter in these affairs, right?
The Dallas Cowboys dropped their preseason opener to the San Diego Chargers by a 17-7 score. Two Dallas turnovers led to Charger touchdowns, and along with some really bad kick and punt coverage, largely determined the outcome. But it was fairly evident that the Cowboys placed no weight on winning the game.
For the Cowboys this was clearly all about evaluating their own players. While the Chargers came out with basically all their starters to open the game, Dallas was missing large numbers of their ones, especially on offense.