MMAFighting.com reported Tuesday that Jones took a polygraph test last month in the hopes of proving he's telling the truth about never knowingly taking Turinabol, an anabolic steroid, or any other performance-enhancing drug leading up to his UFC 214 fight.
The result will add some weight to claims that Jones was an unwitting victim, though the test was not requested by, or linked to, the UFC or USADA.
During Jones' absence, Daniel Cormier was reinstated as the UFC light heavyweight champion.
The former champion has maintained his innocence ever since it was announced last August that he failed a drug test the day before his light heavyweight title fight with Cormier.
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Asked whether he expected North Korea and South Korea to settle outstanding issues at Saturday's talks, he appeared optimistic. North and South Korea have already made progress in bilateral talks.
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Almost two weeks ago, the Vice President of Athlete Health and Performance Jeff Novitzky told Joe Rogan that he did not believe Jones knowingly took the banned substance.
The fourth episode of UFC 220 Embedded is now online.
Although he was initially provisionally suspended by USADA, he'll meet with the CSAC next month for a hearing. In what appeared to be the ultimate story of redemption, Jones handled Cormier once again, coming away with a convincing third-round TKO win and regaining his light heavyweight championship. He was suspended for one year after testing positive to two banned substances (letrozol and clomiphene) before UFC 200 - blaming the result on a sex pill.
The event takes place Saturday at TD Garden in Boston and airs on pay-per-view following prelims on FS1 and UFC Fight Pass.