[4] He scored a second-round KO victory against Quinton Rankin in November[5] before facing Lennox Allen for the vacant WBA interim super middleweight title on August 8, 2020, at the Microsoft Theater in Los Angeles, California.

[6] In what was described as a dominant performance, Morrell captured the WBA interim title via twelve-round unanimous decision (UD) with the judges' scorecards reading 120–108, 119–109, and 118–110.

[7][8] He was set to make the first defense of his title against Mike Gavronski on December 26 at the Shine Exposition Hall in Los Angeles.

[15] Morrell defeated Kalajdzic by unanimous decision and won the vacant WBA "Regular" light heavyweight title.

[16] On October 8, 2024 it was announced that Morrell would face David Benavidez, who at that time held interim WBC light heavyweight title.