He was only 25... R.I.P.
Quinones was an undefeated boxer (10-0) until his matchup with
Jose Munoz on September 24 at Coliseo Elias Chegwin ... when he was knocked out with less than a minute left in the fight.
Video of the fight shows Quinones fall down after getting punched ... and he's unable to get back on his feet. He was then taken out of the ring on a stretcher by medical personnel.
It was reported that Quinones suffered a blood clot in his brain as a result of head trauma from the fight ... and was in a coma after surgery. He was declared brain dead on Thursday, but remained on a respirator until his passing.
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