At the heart of the problem was right tackle Doug Free, who struggled mightily in protecting Dallas quarterback Tony Romo. Free gave up the Eagles' only sack of the game to Philadelphia defensive end Brandon Graham in the first half and also was called for two penalties, though one was negated by a defensive infraction.
From Dallas Cowboys blog Blogging the Boys:
Break is what a lot of fans probably did while watching Doug Free's blocking attempts on the Eagles Wide 9. He was routinely beaten; relinquishing sacks, holds, embarrassment, frustration and curse words. Head coach Jason Garrett says that he demands accountability, but folks were hard pressed to understand why Jermey Parnell didn't get a shot at right tackle with Free playing so brutally.
Garrett defended his tackle after the game, telling reporters that he didn't think about benching Free. The head coach and offensive line coach Bill Callahan told Calvin Watkins of ESPN Dallas/Forth Worth that Free played better in the second half, especially in terms of his pass protection.
The sixth-year veteran from Northern Illinois has committed an NFL-leading 13 penalties through 12 games this year.