UFC star Anderson Silva reportedly tested positive for both a steroid and a diuretic in October.
On Friday, MMA Fighting's Marc Raimondi confirmed a report that was first publicized by Combate. Per Raimondi, Silva tested positive for methyltestosterone in addition to the diuretic.
Since methyltestosterone is an anabolic agent, it could yield a two-year suspension.
Silva tested positive for anabolic steroids following a UFC 183 tilt with Nick Diaz in 2015, which resulted in a one-year suspension.
The 42-year-old veteran was supposed to headline UFC Fight Night with Kelvin Gastelum in November 2017, but Silva was pulled from the fight due to his most recent positive test.