The article itself is just a bit of nothing. Some offseason talk. Of course, the headline gets everyone's panties in a bunch.
So much about performing is going out and doing. You can rehearse all you want, but sometimes you don't know if it's there until your in that situation. He probably had the strength to make most of the throws he was doing day to day. However, when he gets to the end of the game and he's tired, but still adrenalized he probably didn't even realize he didn't have what it takes until it was too late.