Taiwan Olympic baseball player Chang Tai-shan has tested positive for a banned substance in a World Anti-Doping Agency (WADA) check, the International Olympic Committee said on Wednesday.
Taiwan were playing their opening Olympic game against the Netherlands on Wednesday morning and Chang was not part of the starting line-up.
The island's baseball association has applied to WADA to have Chang take another urine test, Taiwan's Central News Agency reported.
The player may have taken a Chinese cold medication that contains a banned substance, an official with Taiwan's Olympic Committee told Reuters.