Jonathan Majors' Hollywood career isn't over yet -- even as his sentencing looms, he's going full gym rat, getting in shape for an upcoming film shoot ... and we got a glimpse of his routine.
Sources close to Majors tell TMZ … he was in L.A. for a week, hitting the gym hard and training for a possible gig before flying back to New York.
GETTING RIPPED
No word on what Jonathan's potential role might be, but we're told it would require him to be in incredible shape .