basically. Good answer. Oscar had his chin up in the air at those weights. Relied on his handspeed too much and left himself open. And his chin wasn't as solid as it would become at the higher weights.
Oscar, Yes he was a bit fragile around the chin at 130 , but he would have just hit too hard , Oscar was a real monster down there. JMM would not have been knocked out though , but would lose wide on the cards.