Born in Victoria, British Columbia, Foster dropped out of high school to start his racing career.
[3] Foster won the 1963 CAMRA (Canadian American Modified Racing Association) in 1963 in the first year of the series.
He became best friends with Mario Andretti,[4] who later claimed he would never again form a close friendship with a fellow racer because Foster's death so significantly affected him.
[5] Foster ran a NASCAR Cup Series race at Riverside International Raceway in 1966 and finished 7th.
During practice for the 1967 Motor Trend 500 at Riverside International Raceway, Foster lost control of his car after a brake drum failed.