Shaun Weiss -- best known for playing Goldberg on "The Mighty Ducks" and sadly, this mug shot -- is in trouble again ... just months after announcing he checked into rehab.
Law enforcement sources tell TMZ ... the actor was busted in November for allegedly shoplifting more than $200 worth of stuff from an L.A. Rite Aid. We're told he's now facing a petty theft charge and a probation violation.
We broke the story ... Weiss was arrested for public intoxication in August when cops took this rough-looking mug shot. The shocking image prompted friends to plead with him to get help.
Shaun announced he was doing just that days later, saying he'd checked into a long-term rehab center. He admitted that "without immediate treatment my life is in eminent danger." It's unclear when he left the treatment center.