#4 Chad Mendes

In 2016, former UFC featherweight title contender Chad Mendes was slapped with a two-year suspension for a USADA violation. It was later found out that it was because he tested positive for GHRP-6, a known growth hormone, which led to him being slapped with a two-year suspension.
Similar to Machida's case, what makes Mendes' suspension controversial was that it was also supposedly taken without the intention of enhancing performance. According to the Team Alpha Male representative, the substance may have been found in the skin cream he was using to treat the plaque psoriasis he has been dealing with for years.
Get the latest updates on One Championship Rankings at Sportskeeda and more
Mendes was 30 years old at the time he was suspended, which shaves off a couple of years of his prime. He last fought in December 2015 against former lightweight champion Frankie Edgar where he lost via first-round knockout, and it remains unclear when he would be able to get his career back on track. All because of some contaminated skin cream.