Former Mexican double weight champion, Ricardo López is one of the fifteen world champions who have retired from boxing without a loss. The fighter was undefeated for 51 consecutive fights with a single draw in his professional career.
Willie Pep, during his time competed in a total of 241 fights out of which he won a staggering 229. The defensive fighter had two winning streaks of 62 and 73.
Carlos Monzón was the undisputed world middleweight champion for seven consecutive years and had a dominating professional career. The Argentine was leagues apart from any one else and was undefeated for 81 fights in a row.
Julius Caesar Chávez was a champion in three different weight classes and is a highly decorated legend of the sport. During his career from 1980 to 2005, Chávez had an incredible undefeated record of 90 fights.
Widely regarded as the pound-for-pound greatest boxer of all time, Sugar Ray Robinson was a force of nature. In his era, Robinson was undefeated for a whopping 91 fights and was a multi division champion.