 Also a talented basketball player, Tweeddale represented the Victoria Country side at the 1976 Australian Basketball Championships.After starting at St Kilda with the reserves, in 1975, Tweeddale broke into the seniors in the 1977 VFL season.He was one of St Kilda's best players on his league debut and made a total of 17 appearances that year, followed by 17 in 1978 and seven in 1979.