& WBC World Heavyweight titles. Win Karl Mildenberger TKO 12 (15) 01966-09-10 September 10, 1966 7001240000000000000 24 years, 7002236000000000000 236 days Frankfurt, West Germany Retained The Ring & WBC World Heavyweight titles. Win Brian London KO 3 (15) 01966-08-06 August 6, 1966 7001240000000000000 24 years, 7002201000000000000 201 days London, England Retained