, WBC & WBA World Heavyweight titles. Win Ron Lyle TKO 11 (15) 01975-05-16 May 16, 1975 7001330000000000000 33 years, 7002119000000000000 119 days Las Vegas, NV Retained The Ring , WBC & WBA World Heavyweight titles. Win Chuck Wepner TKO 15 (15) , 2:41 01975-03-24 March 24, 1975 7001330000000000000 33 years, 7001660000000000000 66 days Richfield, OH