Jon Jones is still the reigning UFC Light Heavyweight Champion despite the recent reports about him failing drug tests taken on the weekend of his UFC 214 clash against Daniel Cormier. However, his story could be about to take an interesting twist.

Bones was tested positive for the anabolic steroid Turinabol on his July 28 urine screening, one day prior to him winning the UFC Light Heavyweight title at UFC 214 by knocking out DC via a head kick and punches in the third round inside the Octagon at the Honda Center in Anaheim, California.

Due to this positive test result, Jones' title win could be revoked and he could be stripped of the championship. If this happens, this would be the third time he has been stripped from him during his career.

However, this story has taken an interesting twist, as according to MMA Fighting's Ariel Helwani, the Light Heavyweight champion passed a blood test administered by the USADA on July 29.

It is important to note that USADA blood screenings do not test for Turinabol, meaning his test on July 29 would not have discovered any trace of Turinabol in Jones’ system. Jones also passed a pair of out-of-competition USADA drug screenings on July 6, a blood and urine test, and on July 7, a urine test.

Jones’ agent, Malki Kawa, adamantly defended Jones’ innocence last week following the first set of test results, saying a tainted substance is responsible for the positive results. 

A USADA spokesman released a statement confirming publicly that Turinabol is the substance Jones tested positive for, saying: “Given that Mr. Jones’ agent has publicly commented on this case, we can confirm Mr. Jones provided a urine and blood sample on July 6th and an additional urine sample on the 7th — all of which were reported negative.

"On July 28th, his urine sample tested positive for turinabol — as confirmed previously — then after the fight he provided a blood sample that was reported negative.”

“The prohibited anabolic steroid turinabol is only tested for in urine screens and not in blood tests. Urine and blood screens are complimentary to each other and don’t analyze for the same substances. Importantly, Mr. Jones is innocent unless and until the established process determines otherwise. It’s only fair to let due process occur before jumping to any conclusions.”

Bones was previously stripped of the Light Heavyweight title in 2015 due to his role in a controversial hit-and-run accident, and he was also stripped of the UFC interim Light Heavyweight title after testing positive for two banned substances, clomiphene and letrozol, prior to a planned rematch against Cormier at UFC 200.

If the B-sample of Jones' July 28 test comes back with the same result of the first test, it could spell the end of his career in UFC as he would face upwards of a four-year suspension as a multiple-time offender.