Whenever an upset occurs, people will be full of conspiracy theories as to why it happened. The fact is that Ruiz was just the better man on the day. AJ couldn't cope with his handspeed and Ruiz had a good enough chin that he couldn't rely on his power to bail him out. The rumours about concussion, panic attacks etc... have mostly come from rivals of Matchroom and their favoured journalists. Consider that it was claimed that Kabayel had knocked AJ out, then once it was revealed that AJ hasn't even sparred Kabayel, they latched onto the first fighter mentioned as having sparred AJ in Dawejko. There's no way that Hearn would have risked going ahead with the fight if AJ wasn't close to 100%. Fights get cancelled or postponed all the time. It's understandable that some AJ fans want to find an excuse for the loss, but there just isn't one.