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.
[2] He won the inaugural WBO junior middleweight title in 1988 with a win over Lupe Aquino.
After being stripped of his WBA title in August 1994, Jackson lost in an attempt to regain the belt in December of that year to Jorge Castro via 9th-round TKO, in a fight that was named Fight of the Year by Ring Magazine.
On the verge of forcing a referee's stoppage against the badly beaten up Castro, Jackson was caught and knocked down by a left hook, then stopped after two further knockdowns.
In an ugly fight in which Jackson looked a faded fighter, Hopkins won via a 7th-round TKO.