B.J. Penn was pulled from his comeback fight against Cole Miller -- which was set to go down on June 4, 2016 at UFC 199 -- after "The Prodigy" admitted to using an IV under a doctor's supervision.
A big no-no under the new United States Anti-Doping Agency (USADA) guidelines.
Still, Penn maintains he was unaware of the fact the rule was applicable year-round. Nevertheless, he recently told KHON2 (via FOX Sports) that he is fully aware that his ignorance should not go unpunished. That said, he doesn't plan on putting an end to his mixed martial arts (MMA) comeback after suffering yet another speed bump.