Todd first came to notice when he scored 7 goals in South Fremantle's reserve grade WAFL premiership. He made his senior debut the following year aged 16 years and 336 days, one of the youngest and played in every league game, winning both the Sandover Medal and South's best and fairest award. Aged 17 and 4 months when he beat Graham Farmer by 4 votes in the 1955 Sandover Medal count, he was the youngest ever winner in open-age competition (Laurie Bowen was younger when he won the award in 1942, one of the seasons which were restricted to under age during World War II).