In the 100 m backstroke, Gleason challenged seven other swimmers in heat two, including Olympic veteran Nicholas Neckles of Barbados. He raced to fifth place and thirty-seventh overall by 0.07 of a second behind Finland's Matti Mäki, outside his entry time of 57.64. In his second event, 100 m freestyle, Gleason placed forty-fourth overall out of 71 swimmers from the morning's preliminaries. He raced to sixth place in heat four at 51.69, just 0.05 of a second off his entry time from the Pan American Games.