The 21-year-old Latino boxer needed a single punch, eight seconds and a massive left jab to knock down UFC veteran John Moraga in the first round.
From there, it was a matter of time before the junior lightweight prospect earned his second career KO in his second pro fight.
Castro (2-0, 2 KOs), of Fresno, California, knocked down Moraga (1-3, 1 KOs) three times in two rounds to register the knockout, finishing the fight with a left uppercut.
Moraga, of Phoenix, has had an impressive MMA career, with a 19-7 record and a UFC flyweight title shot in 2013 that he lost to Demetrious Johnson. His first knockout loss in boxing was Moraga’s third defeat in four pro bouts.
Castro is still very, very early in his pro career, but the friend of star fighter Ryan Garcia made easy work of an overmatched opponent.
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