allamericanpup pretty much sumed it up! love the potbelly pig remark also lol.........sadly some call them pits ukc will allow akc amstaffs to gegister as pits.i dont know where the blue comes from there were never any blue pits back in the day,some believe its a defective black gene,some say its a neapolitan blue bandog outcross bred back to amstaffs...rs
I forgot what blood line that is but it is all pitbull and a dam nice one. He is just standing with his legs apart I will post a link to a breeder that has one just like him maybe you can contact him about a pup!
Honestly he looks like a Large Blue Staffordshire Bull Terrier with bad conformation, Horrible Angulation & Honestly it looks like that dope him up on something ( steriods maybe & not un heard off ) Try & different breeder