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The UFC middleweight's real estate license was also revoked.On Jan. 3, Sonnen admitted his involvement in a scheme to fraudulently collect more than $69,000. According to reports by The Oregonian, the money was a portion of a bank loan sent to a plumbing company to perform work, which was never completed, on a house Sonnen sold.
The sentencing is the most recent development in a long line of troubles for Sonnen.
Sonnen (25-11-1) last fought for the 185-pound title against Anderson Silva at UFC 117 last August. The former all-American NCAA wrestler controlled Silva throughout the fight but was submitted late in the fifth round.
Following the contest, the California State Athletic Commission found abnormally high levels of testosterone in Sonnen's drug test. At a subsequent hearing, Sonnen said he had undergone testosterone-replacement therapy since 2008 as treatment for hypergonadism.
According to the commission, Sonnen failed to properly reveal his condition prior to the fight. The result netted Sonnen a six-month suspension, which he has since served.
The UFC had planned to put him back in action against Yoshiro Akiyama at UFC 128 in March, however Sonnen was forced to withdraw from that fight when news broke of the federal charges against him.
In 2010, prior to the fight with Silva, Sonnen unexpectedly dropped his well-known political aspirations when he withdrew his candidacy for the Oregon House District 37, vaguely citing legal problems as the reason.
Sonnen's UFC contract was frozen by the promotion earlier this year. He was rumored to be in line for a coaching opportunity opposite British fighter Michael Bisping on the reality series "The Ultimate Fighter," but president Dana White has said the UFC won't call on him until he's dealt with personal issues.Brett Okamoto covers mixed martial arts for ESPN.com.