Robert Drysdale will have to withdraw from his UFC 163 bout with Ednaldo Oliveira due to a staph infection, according to a report from the Las Vegas Review-Journal . Drysdale is one of the most decorated grapplers in the world. He is a World Jiu-Jitsu Championship gold medalist, as well as a winner of the Abu Dhabi Submission Wrestling World Championship absolute division. He has quietly amassed a 6-0 record in professional mixed martial arts competition, since beginning his transition to the sport in 2010. Holding true to his background in grappling – and similar to UFC women’s bantamweight champion Ronda Rousey – Drysdale has submitted all six of his opponents and all in the first round. In fact, he has never gone longer than 2:54 in an MMA bout. Drysdale will, however, have to wait to make his UFC debut due to the staph infection. There has been no word from UFC officials yet on whether or not they have found a replacement to step in and face Oliveira or if they will scrap the bout altogether