The Ultimate Fighting Championship is serious about cleaning the sport of MMA, even getting the help of the US Anti-Doping Agency to screen the fighters in upcoming events. This partnership has already resulted in the pullout of Jon Jones from UFC 200. Sports Illustrated says that there may be more to come.
The UFC on FOX 20 card this weekend will be headlined by Holly Holm. A lot of other intriguing matches will also be featured. George Sullivan will suffer the same fate as Jones and get pulled out as well.