He is best known for working with National Wrestling Alliance (NWA), American Wrestling Association (AWA), World Wrestling Federation/Entertainment (WWF/E), World Championship Wrestling (WCW), Extreme Championship Wrestling (ECW), Ring of Honor (ROH) and Total Nonstop Action Wrestling (TNA). He is the first and only person to have been inducted into the WWE, WCW, Professional Wrestling, NWA, Hardcore, Wrestling Observer, and St. Louis Wrestling Halls of Fame.