Canelo Alvarez
Alvarez is one of the most marketable and famous athletes on the planet. The Mexican boxer won titles in multiple weight classes but controversy stained him in 2018. He failed a drug test after he tested positive for Clenbuterol, an anabolic steroid. This resulted in a six-month ban for the seedy superstar.
His team claimed that contaminated Mexican meat was responsible. But Canelo’s opponents cried foul and boxing fans claimed that he was a cheat. Alvarez rebounded from the incident and did a great job of brushing it under the table. But it happened and there is no denying that fact (via Mirror).