Apparently those judges valued the stats more.
I'm not saying it was a good call here, but I'm also not saying that it's totally baffling given how decisions like that are apt to go. Watching from home, listening to biased Teddy Atlas who was in the bag for Manny, that fight looked one way. Sitting ringside in a judges box, watching Horn as the aggressor, listening to that crowd react to Horn as the aggressor, it's not hard to comprehend how they make a homer-decision since the fight looks very different from that vantage.
The real winner was boxing itself.
Mayweather/Pacquiao was such a dud, after such a build-up... This fight was shown for free, on cable, with several undercard belts, and the main card, controversy notwithstanding, was a great ****ing scrap. If boxing can get a few more cards like this in the bag- major fighters, free on either broadcast or cable, exciting fights, big enough to be a real 'event' like this one was- it's possible it (boxing) might start gaining younger eyeballs again that have been taken away by MMA.