| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Johannes Marthinus Jacobus•du Plessis | |
| Used name | Marthinus•du Plessis | |
| Born | 2 June 1932 in Alldays, Limpopo |  RSA |
| Died | 21 June 2011 (aged 79 years 19 days) in Stilbaai, Western Cape | RSA |
| NOC | South Africa | RSA |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1956 Summer Olympics | Modern Pentathlon | RSA |
Marthinus du Plessis | |||
| Individual, Men (Olympic) | ||||||
| Team, Men (Olympic) | South Africa |
