The artist formerly known as Jon Koppenhaver is heading back behind bars.

"War Machine," who served a year in prison for assault, recently returned to mixed martial arts (MMA) as a surprising addition to the Bellator roster following his technical knockout finish over former UFC standout Roger Huerta back in November.

The ex-porn star vents on his Twitter (compiled by Middle Easy):

"Seems my year in jail wasnt enough. Just got sentenced to another year in Vegas for some old bullshit. Nevermind Im rehabilitated. Nevermind Ive been out for over 6 months now and doing great and am finally back on my feet. Nevermind all my students that will miss me. Do another year and rot n waste time. Make no money, pay no taxes. Whatever, I just hope my boy @bensaundersMMA wins @BellatorMMA tournament. Fuck the motherfucking system! Fuck the bullshit! Vacation time, back to jail in 2 weeks! Cant stop me, all you can do is delay the inevitable. War Machine will always be back! Oh ya the judge looked and me and said she can tell Im on steroids and that thats prolly why I got in so many fights and am angry..lol Bitch"

Bellator has not commented on Koppenhaver's recent statements and outside of his tweets, no details are yet available on his upcoming stint in the pen.

Stay tuned.