Joshua Griffiths, a British marathoner, received a three-month ban for benzoylecgonine, a cocaine metabolite. The sample was taken post-Belfast marathon on May 3. Griffiths initially disputed the claim but accepted the charges.

The Athletics Integrity Unit disqualified his Belfast results and suspended him from June 19 to Sept. 19. Griffiths claimed no knowledge of how cocaine entered his system. He argued the low level of cocaine couldn't have affected his performance. Read more culture coverage.

Despite his claims, the AIU found the ingestion was out-of-competition. Griffiths admitted to the violation, resulting in a three-month ban. This was his first offense, leading to a reduced sentence. Related: Kenya’s Mercy Oketch Suspended Over Banned Substances.

This original Runner World brief is based on reporting from Canadian Running. Visit the source for its complete reporting, context and any later corrections.