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
Joseph Parker (boxer) early October he had been negotiating an alternative WBO title fight against Andy Ruiz, suggesting he had a chance of reaching a deal with Bob Arum. He pointed out that WBO rules stated that the two best-classified contenders' will challenge for the title. Arum told "ESPN.com" that he was in talks with the WBO about making it for the vacant title. He also said his experience dealing with Parker and his team has so far been a pleasure. Parker became the first heavyweight boxer from New Zealand to win a world title as he won via majority decision. Two of