American Pitbull Terrier Breed Standard Akc. However, they are only recognized by the united kennel club (ukc) and not the american kennel club (akc). This is an akc and ukc recognized breed which is more commonly known as amstaff.

The breed was recognized by the akc in 1936. As the breed moved to america the names pitdog and pitbull terrier. Kirby of indiana was one of the earliest akc champion american staffordshire terrier.