Athiaporn Koonjarthong was a member of the Thai 4×400 m Olympic team in 1992, with a best time of 47,93. Three years later he was in the team that was disqualified in heat at the Asian Championship.
Personal Best: 400 – 47.78 (1994).
|1992 Summer||23||Barcelona||Athletics||Men's 4 × 400 metres Relay||Thailand||THA||6 h1 r1/2|
|1992 Summer||23||Barcelona||Athletics||Thailand||THA||Round One||Heat One||6||3:08.00|