The Fighting World has a Chris Brown Situation on its hands…..UFC star Tito Ortiz was arrested for felony domestic violence earlier Monday morning after attacking girlfriend Jenna James in the Huntington Beach, California home he shares the retired adult film star. Cops collared the beefy Ortiz after responding to a distress call to find Jenna with “visible injuries.”

Tito — a former contestant on NBC’s The Celebrity Apprentice — is currently in custody and en route to a Huntington Beach jail.

The troubled couple are the parents of one-year-old twin boys, Jesse and Journey.

(OMG — he’s huge compared to her and he’s a professional brawler. He could do serious damage by slinging her around like that. We certainly hope there’s been some misunderstanding, Tito!)