1988-07-16 Simon Brown w rsc 3 (15) Jorge Vaca, National Arena, Kingston, Jamaica - IBF
1988-07-16 Simon Brown w rsc 3 (15) Jorge Vaca, National Arena, Kingston, Jamaica - IBF. Referee: Rudy Battle. Starting strongly, the champion soon had the ringworn Vaca (147) in trouble and floored him with a right to the jaw just before the bell rang to end the opening round. If the first round had been bad for Vaca the second was even worse, Brown (146¼) dropping him four times, but although he made it into the third there would be no respite and after being cut over the left eye by heavy left hooks another one sent him to the floor for the sixth time. That was it as far as the referee was concerned and the fight was halted on the 2.05 mark.
The IBF announced that, as from 1 September, all world title bouts held under their banner would be contested over 12 rounds and from thereon all world title bouts in this weight division would be contested over that distance.