#4 A clean fighter
Before their first fight at UFC 182, Jon Jones found himself in what may now seem as a clear warning sign of his future steroid test failures -- back when Jones' testosterone/epitestosterone (T/E) levels were noted to be suspiciously low per the standards of an average athlete.
Jones then failed a drug test before his fight against Cormier at UFC 200 back in 2016 -- testing positive for not one but two PEDs -- clomiphene and letrozole. After serving a 1-year suspension that was handed down to him by USADA (United States Anti Doping Agency), Jones returned and eventually fought Daniel Cormier in their rematch at UFC 214 -- proceeding to stop DC by way of a vicious 3rd Round KO.
In the ensuing days, it was revealed that Jones failed yet another drug test, this time around for turinabol -- which is considered to be an anabolic steroid. His UFC 214 win over DC was subsequently overturned to an NC.
The man was given a 15-month retroactive suspension, and can resume professional MMA competition from the 28th of October, 2018. On the contrary, Cormier -- who has been tested by USADA since his days as an amateur wrestler -- has never tested positive for PEDs...