Casimero, who previously held a light flyweight and flyweight world title, has been on a tremendous run since he chose to move away from fighting at super flyweight ever since a 12-round decision loss to Jonas Sultan in 2017.
John Riel Casimero scored a third-round KO of South African Zolani Tete Saturday night (early Sunday morning in Manila) to capture the WBO bantamweight title in Birmingham, England.
Casimero, who will be making his second appearance on British soil, trained for nearly two months in Las Vegas to get ready for Tete.
Filipino boxer John Riel Casimero is back as world champion.
Another knockdown followed after a flurry from Casimero capped by a left hook, and although Tete still stood up, Referee Steve Gray had seen enough after another barrage from Casimero and stopped the contest at the 2:10 mark of Round 3.
Coming into the fight as the underdog, Casimero dominated and hurt Zolani Tete in the third round to become the WBO's newest champion at 118 pounds.
Tete was originally scheduled to unify his WBO world title against WBA champion Nonito Donaire in the semi-finals of the World Boxing Super Series bantamweight tournament but he suffered a shoulder injury during fight week and was forced to pull out of the bout last minute.
"All my opponents are great fighters".
"I don't really think about fighting on the road", insists Casimero.
"Getting credit as the ultimate road warrior doesn't matter to me", notes Casimero, who is angling for another road trip as he is eager to face unbeaten, unified bantamweight titlist Nayoa Inoue (19-0, 16KOs) next year in Japan.