Jon Jones says he never knowingly ingested any banned substance. Yet the former UFC light heavyweight champion failed a drug test in June, forcing the the UFC to pull him from the UFC 200 main event last week.
USADA's results management process has to play itself out. It seems like Jones and his team are laying the foundation for a tainted supplement defense. And it's certainly possible Jones took something that was contaminated.
Both Yoel Romero and Tim Means tested positive for banned substances in USADA drug tests this year.