Sarapong Kumsup had his first international appearance in the 4×400 team at the Asian Championships 1991, winning silver. After the 1992 Olympica he competed in the team winning another silver at the Asian Games 1994. On the same occasion he qualified for the 400 m final, ending on 8th place.
Personal Best: 400 – 47.37 (1994).
|1992 Summer||21||Barcelona||Athletics||Men's 4 × 400 metres Relay||Thailand||THA||6 h1 r1/2|
|1992 Summer||21||Barcelona||Athletics||Thailand||THA||Round One||Heat One||6||3:08.00|