josé ángel nápoles, nicknamed "mantequilla" ("butter", because of his smooth boxing style), (april 13, 1940 – august 16, 2019) was a cuban-born mexican boxer and a world welterweight champion. he was ranked as one of the greatest fighters of all time. he was a member of the international boxing hall of fame. his record of the most wins in unified championship bouts in boxing history, shared with muhammad ali, was unbeaten for 40 years.