Johan Du Preez had the following podium finishes at major championships: 3rd in the 1962 British Empire and Commonwealth Games 220 yards. He also finished fourth with the 4×110 yards relay team (with Jeffery Smith, Danie Burger, and the non-Olympian Roy Collins) and was eliminated in the quarter-finals of the 100 yards at the 1962 British Empire and Commonwealth Games. In the British Empire and Commonwealth Games Du Preez competed for the Federation of Rhodesia and Nyasaland.
Personal Bests: 100 – 10.79 (1964); 200 – 20.8y (1964).
|1964 Summer||28||Tokyo||Athletics||Men's 100 metres||Zimbabwe||ZIM||5 h2 r1/4|
|1964 Summer||28||Tokyo||Athletics||Men's 200 metres||Zimbabwe||ZIM||8 h2 r2/4|
|1964 Summer||28||Tokyo||Athletics||Zimbabwe||Round One||Heat Two||5||10.7||10,79|
|1964 Summer||28||Tokyo||Athletics||Zimbabwe||Quarter-Finals||Heat Two||8||21.8||21,87|
|1964 Summer||28||Tokyo||Athletics||Zimbabwe||Round One||Heat One||4||QU||21.4||21,45|