Yes he was hurt but wasn't seriously hurt to the point where he's ready to be taken out. He was caught unaware and was stunned from it. If he was seriously hurt he would have totally lost his legs and gone down.
Maravilla fired back as hell against Fatboy in the 12th and he was almost out on his feet :rofl And Fatboy was not able to finish him :hey
It didn't look all that bad to me. He may have stunned a little but he was alss off balance. And let's not forget Canelo, was still a 19 yr old KID. His body hadn't even fully developed yet.
Not seen this before, was surprised by it tbh he was definitely rocked for a moment. But yes I would say his punch resistance is still good currently.