Earlier today it was reported that Thiago Silva was set to pull out of his UFC 130 bout with Quinton ‘Rampage’ Jackson and would be replaced by Rashad Evans.

Confusion then reigned when Silva’s manager revealed that he wasn’t injured and still expected to fight ‘Rampage’ at the May 28th event.

Now the plot has thickened yet further with a confirmation from MMAJunkie that Evans has indeed approached about replacing Silva.

More worryingly for the Brazilian fighter however is the suggestion that the Nevada State Athletic Commission is doing further analysis on one drugs test that was taken during the recent UFC 125 event on January 1st which Silva participated in.

“The athletes who provided negative samples were Frankie Edgar, Gray Maynard, Chris Leben, Brian Stann, Brandon Vera, Phil Baroni, Thiago Tavares, Jeremy Stephens, Dustin Poirier, Diego Nunes, Daniel Roberts, Jacob Volkmann, Dong Hyun Kim and Clay Guida,” reports FightersOnly after speaking to NSAC.

That list includes 14 of the 16 participants at the event. The only fighters missing from the list are Thiago Silva and Josh Grispi.

Given the news that the UFC are now speaking to Evans to potentially replace Silva, it appears as if they may be bracing themselves for bad news.

Silva fought at UFC 125 following a year long absence due to a series back injury which had plagued him for a number of years. He went on to defeat Brandon Vera by unanimous decision to set up a fight with Rampage.