[Waninski]

You know what...I am wrong.

Even if the runner is safe at first and the throw goes home, it is still a sacrifice.

EDIT: Because, the batter's intent was to sacrifice himself in order to get the run across the plate. You can apply this to the scenario if there was a runner on second. If the pitcher fielded a bunted ball, wheeled to fire to third, but the throw was late and the batter is safe at first, it is still a sacrifice.