John David Jackson (boxer) John David Jackson (boxer) John David Jackson (born May 17, 1963) is an American former professional boxer who competed from 1984 to 1999, and has since worked as a boxing trainer. He is a two-weight world champion, having held the WBO junior middleweight title twice between 1988 and 1993, and the WBA middleweight title from 1993 to 1994. Jackson turned professional in 1984 and won his first 20 fights. He won the inaugural WBO junior middleweight title in 1988 with a win over Lupe Aquino. He defended the title six times before moving up to middleweight in 1993 to take
Chris Eubank 20 lbs in weight and challenged Britain's Carl Thompson for the WBO cruiserweight title. Eubank floored Thompson in the fourth round but, as in the first Steve Collins fight, failed to press home his advantage. The fight went the distance, with Thompson's strength and durability eventually telling in the later rounds. Thompson won by unanimous decision, but the closeness of the fight was reflected in the scoring, with two of the three judges giving the fight to Thompson by a single point. A rematch was quickly arranged for three months later and they again fought for the WBO cruiserweight championship