And Middlebrooks should've caught that throw or blocked it. That's the game right there, do all you can do to block that ball.
"OBSTRUCTION is the act of a fielder who, while not in possession of the ball and not in the act of fielding the ball, impedes the progress of any runner. *
If a fielder is about to receive a thrown ball, and if the ball is in flight, directly toward, and near enough to the fielder, so he must occupy his position to receive the ball, he may be considered "in the act of fielding a ball." It is entirely up to the judgment of the umpire, as to whether a fielder is in the act of fielding a ball. After a fielder has made an attempt to field a ball, and has missed, he can no longer be in the "act of fielding" the ball. For example: an infielder dives at a ground ball and the ball passes him and he continues to lie on the ground and delays the progress of the runner, he very likely has obstructed the runner."*