Rubuta ci gaba don wannan sakin layi - Forbes ya kasance memba na 'yan wasan motsa jiki na maza na Australiya daga 1975 zuwa 1980 kuma a wannan lokacin ya wakilci Australia a 1977 Summer Universiade a Sofia, Bulgaria
, 1978 Gasar Gasar Gymnastics ta Duniya a Strasbourg, Faransa, 1979 Summer Universiade a Mexico City da 1979 Gasar Gymnastics ta Duniya a Fort Worth, Texas. A Wasannin Commonwealth na 1978 a Edmonton, Kanada, ya lashe lambar tagulla a gasar ƙungiya ta maza.