Jermell Charlo delivered an early birthday present to himself in a 154-pound championship stoppage Saturday, twice flooring Brian Castaño in the final round of a 10th-round knockout victory.
In front of near-sellout crowd of 7,406 at Dignity Health Sports Park in Carson, Calif., Charlo, who turns 32 on May 19, became the division’s first undisputed champion in the history of the sport by adding the Argentine’s WBO crown to his IBF/WBA/WBC versions.
