 He grew up in the Brisbane suburb of Albany Creek and attended the Queensland Academy of Sport.In 1999, Trappett won two gold medals and broke two national records in the Men's 100 m and 200 m events, at the National Championships in Canberra and the Metro Challenge in Toronto, respectively.At the 2000 Sydney Paralympics, he won a gold medal in the Men's 100 m T54 event, for which he received a Medal of the Order of Australia, and a silver medal in the Men's 4x100 m T54 event.