Óscar Collazo retains minimumweight crown with knockout – World Boxing Association
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Puerto Rican world champion Óscar “El Pupilo” Collazo (13-0, 10 KOs) reaffirmed his dominance at 105 pounds, scoring a seventh-round technical knockout over the Philippines’ Jayson “Striker” Vayson (14-2-1, 8 KOs) in the main event on September 20 at the Fantasy Springs Resort & Casino in Indio, California. With the victory, Collazo retained his WBA …