He is best known for his work in the World Wrestling Federation and World Championship Wrestling, where he used the nickname "The Mouth of the South".
He has managed many professional wrestlers, including Hulk Hogan, Bret Hart (no relation) and Jim Neidhart (The Hart Foundation), Greg "The Hammer" Valentine, Jerry "The King" Lawler, "The Million Dollar Man" Ted DiBiase, Irwin R. Schyster, The Mountie, Earthquake, Typhoon, Dino Bravo, the Nasty Boys, The Giant, and The Honky Tonk Man. He was at one time AWA Southern Heavyweight Champion. Jimmy’s career started in Memphis back in 1978; he made his way to the WWF/E where he became “The Mouth of the South”. After leaving the WWF/E Jimmy went on to WCW and TNA and back to the WWE where he makes occasional appearances.