Alpha B. Kamara was 21 years old at the time of the Sydney Olympics, and was making his only Olympic appearance. On 22 September he participated in the first round heats of the men's 100 metres, and was drawn into heat ten. He finished his heat in a time of 10.74 seconds, eighth out of nine competitors in that heat, and was therefore eliminated. The gold medal was eventually won in 9.87 seconds by Maurice Greene of the United States; the silver was won by Ato Boldon of Trinidad and Tobago, and the bronze was earned by Obadele Thompson of Barbados.