Looks maybe pit mix.. maybe american bulldog/mix.. could be anything really.
he is nice looking tho and he looks very content in that picture.
train him well.. get him around people to socialize him good and treat him well.. you wont find a better dog
As to the "locking jaw" hype..
They dont lock anything.. they simply chose not to let go. They have no more muscles or anything than any other dog breed.They are just simply bigger. I had Pit bulls most of my adult life.. around kids, around my chicks, 4 cats and fish and even my horses. None of them ever acted bad around them. Why? because they where properly socialized , trained and loved and very well taken care of.
It comes down to this really....Socialize, train , love and treat any dog right, you wont have a problem at all.
Any dog breed, unsocialized, tied up in the backyard, not taken care of, untrained.. will go after anything that squeals, runs or otherwise makes moves the dog isnt familar with.,Its called prey drive.
I am not trying to derail this thread. I am just simply sick of the blanket statements that people make about a breed that they have no clue about. Please educate yourselfs with the breed before echoing nonsense and ignorance thats has been fed to you.
I am not denying the fatc that this breed, in the wrong hand is a timebomb waiting to go off. I am also aware that the fact is that they have killed people.. but so have cockers, rotties and alot of other breeds.