Errol Spence Jr. (born March 3, 1990) is an American professional boxer who is a unified welterweight champion, having held the IBF title since 2017 and the WBC title since 2019. As an amateur in the welterweight division, he won three consecutive United States national championships and represented the U.S. at the 2012 Olympics, where he reached the quarter-finals. In 2015, Spence was named Prospect of the Year by ESPN.

As of December 2019, Spence is ranked as the world's third best active boxer, pound for pound, by BoxRec, sixth by The Ring magazine and ninth by the Transnational Boxing Rankings Board (TBRB). He is also ranked as the world's best active welterweight by The Ring[5] the TBRB and second by BoxRec. He has a knockout-to-win ratio of 80.8%.