Metamphetamines and Amphetamine were reportedly found in the sample.
The fighter and his representatives have been notified and the CBP protocol will follow with further information to be released by the WBC in the near future.
Rungvisai is the latest finding since the WBC Clean Boxing Program was launched in 2016.
Below, Dr. Margaret Goodman talks about the Clean Boxing Program at the 54th WBC Convention.
