John Trevor Blokdyk (30 November 1935 – 19 March 1995)[1] was a South African motorcycle speedway rider[2] and Formula One driver who participated in two World Championship Grands Prix, although qualifying for only one.

[5] Blokdyk competed in Formula One for the first time in the non-Championship Rand Grand Prix at Kyalami in 1961, in a Cooper, but spun out early on.

[8] In late 1962, Blokdyk went to Europe to pursue a career in Formula Junior and was soon a front-runner, until he ran short of finances and returned to South Africa.

[3] In 1963 he started his only World Championship race at East London, driving a three-year-old Cooper-Maserati prepared by Scuderia Lupini, and coming in 12th.

[7] Later in 1965 he continued in European Formula 3, and suffered serious pelvic and leg injuries in a crash at Albi which ended his season.