I tend to think that he just wan't there. His head wasn't in it and he didn't bring his A game. Kinda reminded me of Adeline, when Jordan wanted to attack he seemed to be able to get to his attacks but he just waited too long. Sometimes you just have a bad day.
You could tell from his post match interviews that he'd put a ton of pressure on himself to be the best in the world and I think that weight was too much to handle today. He's still one of the greatest wrestlers the US has ever seen and I have no doubt that today was just a blip on the radar of his career, unfortunately it was a pretty crappy day to have a blip.