Vince McMahon, Sr.
DiBiase had a short stint with Vince McMahon, Sr.'s World Wrestling Federation (WWF) in 1979, that was in the transition from being called the World Wide Wrestling Federation. He was awarded the short-lived North American Championship, becoming the title's first champion. On June 19, 1979, he lost the North American Championship to Pat Patterson, who unified the title with the fictional "South American Championship" to become the first ever Intercontinental Champion.