Anyone know what breed this pup is?

Dicer said

Neapolitan Mastiff ?
https://www.akc.org/expert-advice/lifestyle/the-mastiff-breeds/

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Yes Sir...that is what it is. Bit of luck I will be going to visit my buddy in a couple of weeks. His son has one of these pups. I have been advised to bring a rain coat with me when I go visit his son...