These are two of the most accomplished MMA fighters of all time. Which failed test hurt the sport of MMA more? UFC Hall of Famer Royce Gracie tested positive for anabolic steroids after beating Kazushi Sakuraba at Dynamite!! USA in 2007. Royce Gracie MMA Stats, Pictures, News, Videos, Biography - Sherdog.com Anderson Silva failed a drug test in 2015 before he fought Nick Diaz at UFC 183. Anderson Silva MMA Stats, Pictures, News, Videos, Biography - Sherdog.com Update: Attorney: Anderson Silva's failed drug test result of tainted 'sexual performance' drugs http://mmajunkie.com/2015/08/attorn...st-result-of-tainted-sexual-performance-drugs How much does this hurt the sport?