I'm not buying the 'AJ wasn't himself' line that's being spun by a lot of people after last night. From what I saw, it was fairly uneventful early doors then he unleashes a fairly typical AJ barrage to floor Ruiz, and then got clipped himself when he went in for the finish. Problem AJ has is more or less every time he gets hit and hurt, it takes him an age to recover. He was stiff for several rounds after Whyte rocked him, he was stiff for several rounds when Klitschko decked him, and exactly the same last night. This time though Ruiz did not let him get away with that.
He's a good fighter but grossly overhyped, which unfortunately happens a lot these days. When on the front foot he does special but there have been more than enough examples of him being rocked and looking terribly uncomfortable on the back foot for that aura about him to have been significantly damaged after last night. A rematch could easily go the same way but equally I can see AJ being more switched on than ever and dispatching this guy in 1 or 2 rounds. He seems levelheaded enough to view defeat as a learning experience rather than a devastating career blow. I think he'll come back stronger.