Roodzant completed his last practice in Beijing on August 11, 2008, the day before his competition. Roodzant was assigned to heat 2 for his race. He was the fastest swimmer in his heat during the preliminaries of August 12, with a time of 51.69s in the men's 100 metre freestyle event. Overall, however, he was 53rd out of 64 in the event, and as a result, he did not advance.