i kind of believe this because his chin is pretty abysmal for a top 5 fighter. khan naturally walks around at 160-170. that's probably why canelo's stamina is horrible: he cuts too much weight than he needs to
His weight has nothing to do with it. He got stunned by Algieri, KO'd by Prescott, stopped by Garcia, rocked by Maidana, and dropped by ancient Diaz. Some fighters just have weak chins.