Bos made his senior VFL debut during the 1979 VFL season, and playing on the half back flank, won consecutive Carji Greeves Medals for Geelong's Best and Fairest in 1987 and 1988.
He retired at the end of the 1989 VFL season at the relatively young age of 29 to pursue interests beyond football.
Victoria 16.12 (108) defeated South Australia 16.8 (104), at Football Park, 15 May 1984
Western Australia 21.16 (142) defeated Victoria 21.12 (138), at Subiaco Oval, 17 July 1984