1991-10-18 Ray Mercer w rsc 5 Tommy Morrison, Convention Centre, Atlantic City, New Jersey, USA - WBO
1991-10-18 Ray Mercer w rsc 5 Tommy Morrison, Convention Centre, Atlantic City, New Jersey, USA - WBO. Referee: Tony Perez. Making a good start against the champion Morrison (221¾) got away well, banging in punches and having it almost all his own way until the last few seconds of the third round saw the tide beginning to turn. The fourth round saw Mercer (225) getting a foothold in the contest as he began to belt Morrison with solid right hands, and pushing on in the fifth it suddenly became one-way traffic. At this stage of the fight Morrison was out of it as Mercer smashed in punch after punch against his defenceless opponent. Somewhat belatedly, Morrison was rescued by the referee on the 25-second mark when he finally went to the floor after taking a fearful hammering.
Mercer forfeited the WBO version of the title in January 1992 when signing up for a fight against Larry Holmes instead of making a defence against Michael Moorer. Although Mercer versus Holmes was intended to be a title bout it did not wear with the WBO, who then matched Moorer and Bert Cooper to decide the vacancy.