Playing career
In 1964 as a sixteen-year-old, Jansen played for Griquas at the first ever Craven Week tournament. After school he went to the University of the Free State and played provincial rugby for Free State and was a member of the Free State team that won the Currie Cup in 1976.
Jansen made his test debut for the Springboks in 1970 against New Zealand at Loftus Versfeld in Pretoria and played in all four tests during the series against the touring All Blacks. [2] Jansen also gained fame in his first Test for his excellent tackle on All Black flyhalf Wayne Cottrell, that helped swing the momentum of the game in favour of the Springboks. [3] In 1971 he played in the test series against France and Australia. His last test match was the losing test against England in 1972. [2] He played in a further five tour matches, scoring five tries to add to his one test try for the Springboks. [4]
Test history
| No. | Opponents | Results (SA 1st) | Position | Tries | Dates | Venue |
|---|---|---|---|---|---|---|
| 1. |  New Zealand | 17–6 | Centre | 25 July 1970 | Loftus Versfeld, Pretoria | |
| 2. | New Zealand | 8–9 | Centre | 1 | 8 August 1970 | Newlands, Cape Town |
| 3. | New Zealand | 14–3 | Centre | 29 August 1970 | Boet Erasmus Stadium, Port Elizabeth | |
| 4. | New Zealand | 20–17 | Centre | 12 September 1970 | Ellis Park, Johannesburg | |
| 5. |  France | 22–9 | Centre | 12 June 1971 | Free State Stadium, Bloemfontein | |
| 6. | France | 8–8 | Centre | 19 June 1971 | Kings Park, Durban | |
| 7. |  Australia | 19–11 | Centre | 17 July 1971 | Sydney Cricket Ground, Sydney | |
| 8. | Australia | 14–6 | Centre | 31 July 1971 | Brisbane Exhibition Ground, Brisbane | |
| 9. | Australia | 18–6 | Centre | 7 August 1971 | Sydney Cricket Ground, Sydney | |
| 10. |  England | 9–18 | Centre | 3 June 1972 | Ellis Park, Johannesburg |