I've posted this for weeks -- this team's problem, unfortunately, is not singular. It's a team-wide inability to finish games because we do not play sound football for any stretch of time.
We don't emphasize field position, time of possession, special teams, taking care of the football, limiting penalties, building an offensive identity. None of it.
All of these things have eaten at us in our losses with Romo at the helm (I discard the ones with Brad Johnson because I have trouble faulting anyone for not winning with him out there).
A key special teams breakdown lost it for us in OT against Arizona; a defensive meltdown that saw a great effort go to waste by allowing 10 points late in the fourth quarter, compounded by a goofy, game-losing interception from Romo, cost us the Pittsburgh game; an inability to perform a simple tackle on defense cost us, in part, the Ravens game.
Sure, we're good enough to win games late, too. I'm not suggesting we blow EVERY game. But we do what inconsistent, mistake-prone teams do. We play well one week, and then blow assignments the next.
And this typically holds true not just late in games, but throughout the duration (see Romo's two silly first-half interceptions last week) and take place at nearly every position in all three phases of the game.