Spence was on a mission to prove he was the king of the stacked welterweight division. To that end, on September 28, 2019, he took on WBC World Welterweight Champion "Showtime" Shawn Porter in an highly-anticipated unification match at Staples Center in Los Angeles, live on FOX Sports pay-per-view. 

The fight proved greater than the hype. The two champions engaged in a spellbinding war from the opening bell; the see-saw action never stopped. And when it was all over, the 16,702 in attendance at Staples Center in Los Angeles were as exhilarated as the combatants.

Though there were no losers in this headlining event on PBC on FOX Sports PPV, there could only be one winner. Spence Jr. remained undefeated, adding the WBC World Welterweight title to his IBF strap by 12-round split decision.