Conversation so far:
Who is Ted DiBiase?
Ted DiBiase is an American former professional wrestler, manager, ordained minister and color commentator. He is best recalled as WWF's The Million Dollar Man“
When did Ted DiBiase begin to wrestle?
Ted DiBiase went to the Mid-South territory of Bill Watts being promoted as the son of Iron Mike in 1975 where he wrestled for four years.
Did Ted DiBiase ever win anything while wrestling?
Ted DiBiase won the NWA United National Championship, the PWF World Tag Team Championship with Stan Hansen, the World Tag Team Championship with Stan Hansen, among many others.
Did Ted DiBiase join the WWF?
Ted DiBiase received an offer from the WWF. DiBiase was eventually convinced by WWF to sign up.

Question: when did he join wwf?
Self-contained rewrite: When did Ted DiBiase join the WWF?