Complex sentence: As a singles competitor, he feuded with David Sammartino and Hulk Hogan, the latter of whom sought revenge on Beefcake after he and Valiant injured Hogan's protege Hillbilly Jim.
Split into simpler sentences: As a singles wrestler, he feuded with David Sammartino and Hulk Hogan. Hogan sought revenge on Beefcake after he and Valiant injured Hogan's protégé, Hillbilly Jim.