He apologized to the United States team in a statement acknowledging he was “embarrassed by this mistake.”

“My positive test was caused by my inadvertent consumption of food that I did not realize had been baked with marijuana, before I left for the Olympic Games,” Delpopolo said in a statement released by the U.S. Olympic Committee.

“I look forward to representing my country in the future, and will rededicate myself to being the best judo athlete that I can be,” he said.