More legal trouble for ex-boxing champ Victor Ortiz -- who was arrested for DUI in California over the weekend ... TMZ Sports has learned.
We've confirmed ... the 29-year-old movie star and former "Dancing With the Stars" contestant was arrested on Sunday.
He was booked and released. We reached out to Ortiz but so far no official comment.
Here's the real problem for Ortiz -- he's already on probation stemming from a 2015 battery at a Kenny Chesney concert at the Rose Bowl.
If Ortiz's probation is revoked because of the DUI -- the judge could have him locked up.