At the 1960 Rome Games, Hooper won a silver medal in the Men's Precision Javelin B event. At the 1964 Tokyo Games, he won a gold medal in the Men's Wheelchair Dash above T10 event and two silver medals in the Men's Wheelchair Relay above T10 and Men's Lightweight weightlifting events; he also competed in swimming and wheelchair fencing at the games. At the 1968 Tel Aviv Games, he won a gold medal in the Men's 100 m Wheelchair A event and two silver medals in the Men's 4x40 m Relay open and Men's Shot Put B events; he also competed in swimming, weightlifting, and wheelchair fencing at the games. He participated in the 1962, 1966, and 1970 Commonwealth Paraplegic Games in Perth, Jamaica, and Edinburgh, respectively.