Peter Bennett was chosen for three Australian Olympic water polo teams; but only played in two. He was chosen in the team to attend London 1948 but opted out to pursue his budding career with St Kilda in the Victorian Football League (VFL). It was in 1948 that Bennett really established his career, which extended to 103 games for St Kilda and four for Victoria, as one of the top forwards in the VFL.
He was captain of the water polo team at Helsinki 1952 and vice-captain, to Ray Smee, at Melbourne 1956. Bennett won a gold medal with the Australian team at the 1950 Empire Games in Auckland. His father, Horace ‘Horrie’, managed the Australian team at Antwerp 1920.