D-backs fan (possibly Batman?) catches foul ball, delivers to young Marlins fan

Foul ball souvenirs are a rare commodity. So when Martin Prado hit one over the head of a young fan during Tuesday's D-backs-Marlins game, it seemed like all would be lost. Marlins Park suddenly became a dark, somber place. It was in need of a hero. Luckily, a D-backs fan wearing a Batman shirt caught the line drive and hand-delivered it to the youngster: 

Here he is with his dad:

But who was that D-backs fan giving a foul ball to a Marlins fan? Was he a man? Was he something greater than a man? Either way, it doesn't really matter. It's not who he is underneath -- it's what he does that defines him.