Ex-UCLA linebacker Breland Brandt -- a former five-star recruit and Army All-American -- was arrested earlier this week after cops say he pushed his GF during a heated altercation.
Law enforcement sources tell TMZ Sports Brandt -- who was a top recruit for Jim Mora's Bruins in 2016 -- got into a verbal argument with his girlfriend at Palisades Park in Santa Monica, CA, on Aug. 22 when things turned physical.
We're told witnesses saw Brandt get aggressive with his GF ... and after he grabbed her and pushed her, several people had to jump in to break it up.
Sources say cops were called to the scene ... and they arrested 21-year-old Brandt for misdemeanor domestic violence.
6'4", 210-pound Brandt was held on $20,000 bond at the Santa Monica Police Department.