Earlier this week light heavyweight Stephan Bonnar announced his retirement from MMA, signing off after more than a decade of competition including an October loss to pound-for-pound great Anderson Silva at UFC 153. However, even if he’d opted to continue his career it appears Bonnar would have been out of action for a significant period of time after testing positive for steroids following the defeat.

According to MMAJunkie, Bonnar was popped for using Drostanolone. The infraction marks the second time “The American Psycho” has been nailed for PED use, failing a drug test for a similar substance in 2006 after a loss to Forrest Griffin.

It also turns out Bonnar was not the only fighter on the card to show a banned substance in his system, as marijuana metabolites were found in heavyweight Dave Herman’s system. Herman was also nailed for marijuana use in a pre-fight screening before a scheduled bout last year. Like Bonnar, Herman came up short at UFC 153 so the outcome of the match-up will not need to be overturned.

Also worth mentioning, the UFC handled the screenings based on the lack of a regulatory board in Brazil, meaning the organization disclosed the results despite not necessarily needing to.