Nick went on to face well-traveled veteran Thomas Denny at EliteXC: Unfinished Business in Nick's hometown of Stockton, California . After a sluggish start to the fight, Diaz found his range and dominated Denny during the latter half of the first round.  Diaz continued to keep the fight standing and maintained a high-paced tempo for the remainder of the fight, earning an impressive knockout victory over the veteran Denny 0:30 into round two.  Diaz was rumoured to have a rematch against the current EliteXC Lightweight Champion KJ Noons, airing on CBS October 4, 2008. However, Noons and his camp refused to accept the match. Mark Dion, Noon's manager was quoted as saying, "As far as Nick Diaz, he's not the No. 1 contender out there."  Diaz was scheduled to face Eddie Alvarez for the EliteXC 160 pound title on November 8, 2008 before the company ceased operations. 
In July 2007, Sherk successfully defended his title against Hermes França at UFC 73 .  After the fight, the California State Athletic Commission (CSAC) announced that Sherk had tested positive for Nandrolone , a banned steroid , in a urine test the day prior to the fight. After testing positive for 12 ng/ml of Nandrolone, Sherk was fined $ 2,500 and suspended from competing in California for one year.  Sherk's suspension was reduced to six months after appealing his allegations on December 4, 2007, making him eligible to fight in early January 2008.  Sherk argued that errors were made in lab testing procedures. He asserted that the lab had failed to properly test the vials used in earlier, positive tests for any remaining steroid content, which may have resulted in his sample becoming contaminated.  Quest Diagnostics and the CSAC denied any errors were made.  Following the CSAC's decision to uphold the results of the positive steroid test, the UFC officially stripped Sherk of his Lightweight Championship.  At UFC 80 , . Penn defeated Joe Stevenson to win the vacant title.  After the fight, UFC president Dana White announced that Penn's first title defense would be against Sherk, who was reinstated by UFC in April 2008, and has tested clean ever since.  Sherk and Penn fought at UFC 84 on May 24, 2008. Sherk lost by TKO in the third round after failing to answer the fourth round bell.
ANTONIO “BIGFOOT” SILVA
Caught: 12/17/13 , following his draw against Mark Hunt at UFC Fight Night 33 .
Tested positive for: Elevated testosterone.
Punishment: Silva was slapped with a nine-month suspension by the UFC — which regulated the Brisbane, Australia event — and his $50,000 Fight of the Night bonus was forfeited to Hunt . The draw was changed to a no-contest on Silva’s record.
In his own words : “Clarification: Months before my fight I looked for the UFC doctor Marcio Tannure in Brazil so I could start the hormonal replacement ‘TRT’ which was authorized and recognized by a professional. I started the treatment and 2 weeks before my fight I did all the exams required by the UFC. My testosterone level continued to be low so I was recommended by the doctor to increase the dosage. Unfortunately my level increased too much and caused me to suspend. I only did what was recommended by someone trained who understands about the subject therefore it was not my mistake. I’m cool because I know that the mistake was not made by me, I never tried doing anything wrong for my fight.”
Not his first rodeo: As we explained on page 1 , Silva tested positive for horse-steroids back in 2008, and blamed the result on an over-the-counter testosterone booster called Novodex, which he was using to treat his gigantism. Unfortunately, Silva didn’t disclose that on his pre-fight medical questionnaire, and his attempt to appeal his suspension ended badly . Silva is now the second fighter (after Nate Marquardt) to have failed drug-tests for steroids and elevated testosterone during his career.