Definately- I think he admits this now as he hasnt ballooned after Mayweather. But his biggest problem is thinking his fans will be happy paying for his next fight. Greedy Hattons.
Against Collazo and Mayweather he was at a higher weight, and the Urango one seemed more to do with the (questionable) call from his corner to just jab & grab for the last three that nearly got him into trouble. At his usual 140, he usually seemed to do fine. The Tsyzu fight being an excellent example.
i dont think he has a stamina problem really i just think sometimes he pushes himself too much in fights, and sometimes adrenaline keeps him going strong.
Hatton does have a stamina problem. I would be tired if I held onto my opponents for dear life for 12 rounds.