Career
Before he came to South Melbourne, Lewthwaite played for Ivanhoe Amateurs, in the Victorian Amateur Football Association. Lewthwaite made nine appearances for South Melbourne in the 1961 VFL season. Foreign the rest of his career, Lewthwaite played for Acton in the Canberra Australian National Football League.
Lewthwaite, who was playing coach from 1966 to 1968, remained at Acton until early in the 1972 season, when he retired after bringing up 200 games.