Melvin Guillard’s tumultuous run with MMA World Series of Fighting has reached its official conclusion.

A member of Guillard’s management team, Malki Kawa, announced the news on his Twitter account today:

Kawa’s brother and business partner Abe Kawa commented to MMA Fighting today that Guillard and WSOF management simply had “a difference of opinion.”

“Melvin had his opinion; they had their opinion,” Kawa said, as quoted by Marc Raimondi. “It didn’t work out. Everybody has those times. We asked for his release and they obliged. I’m actually grateful to them. It wasn’t a big deal. It wasn’t a problem. It was two differences of opinions and we didn’t see eye to eye.”

Guillard, who has earned a 32-14-2 record (with two no-contests) in his MMA career, was signed by WSOF last year after making his name in the Ultimate Fighting Championship, where he fought from 2005 to 2012.

It was hoped that Guillard, who was once ranked among the top lightweights in the world and still holds the UFC record for most TKO/KO wins by a lightweight, would regain his form at WSOF and become a star for the promotion.

But problems began immediately, as Guillard failed to make weight for his WSOF debut against Gesias Cavalcante. He missed weight in his next bout too, a split decision loss to Justin Gaethje. That bout, which was supposed to be for gaethje’s lightweight title, was switched to a non-title, catch-weight affair.

Guillard evinced dissatisfaction with his time at WSOF in an interview on April 5, stating he would rather be in the UFC.

Earlier this month, Guillard was pulled from a planned bout against Ozzy Dugulubgov when his team failed to turn in his required medicals on time.  As described here at Caged Insider, WSOF President Ray Sefo described Guillard’s actions as unprofessional.

Kawa, as quoted by Raimondi, described Guillard as “happy to be starting over” but did not say what his next move would be.