The man born Jonathan Paul Koppenhaver was booked into Clark County jail Saturday after he said in a Ventura County, California, courtroom last week that he wouldn't contest his return to Nevada.
Koppenhaver, 32, a former porn actor, is accused of beating adult film actress Christy Mack and her male friend at a Las Vegas home on Aug. 8 before fleeing to the Los Angeles suburb of Simi Valley, where he was arrested a week later.
Prosecutors have filed multiple felony battery, assault and coercion charges that could get Koppenhaver a total of more than 25 years in prison if he is convicted.
Mack told police that Koppenhaver showed up unannounced at her home as she and a friend, Corey Thomas, were sleeping and began beating Thomas.
Mack said Koppenhaver then began beating her as he read her text messages and she feared for her life when he sawed off her hair with a dull knife.
Police said Koppenhaver punched and kicked Mack, who was treated for extensive facial bruises, fractures and lost teeth. Thomas suffered broken bones in his face.
Las Vegas police said in a statement Saturday that Koppenhaver wasn't available for jailhouse interviews. It wasn't immediately clear whether he had an attorney.
Koppenhaver made his Ultimate Fighting Championship debut in 2007 and legally changed his name in 2008. He lost his only pay-per-view bout that same year.
He fought out of San Diego for a variety of promotions and had a 14-5 record as a welterweight. He lost his last fight, in Iowa, last October.