3/14 9:04 AM PT -- TMZ Sports has obtained the police report which says officers responded to the call of a male driver passed out behind the wheel of a black Rolls-Royce SUV.
Cops say when they responded to the scene, they found the SUV -- with the engine running -- in the middle of traffic ... with Broner "unconscious, but breathing" in the driver's seat.
Cops say they tried to bang on the window to wake Broner up -- but ultimately needed to shake the car to get a response from Adrien.
Once he woke up, a confused Broner rolled down his window, and a cop reached inside the car and put it in park.
Officers ultimately got Broner out of the vehicle and noticed he had a "low, slurred speech and bloodshot/watery eyes."
Cops administered a field sobriety test -- Broner did not perform well -- and he was arrested on site.
Boxing star Adrien Broner was arrested for DUI late Friday night in Miami Beach, TMZ Sports has learned.
We're told the 30-year-old former champ was stopped by police around 8:45 PM local time -- and officers quickly believed Broner was under the influence, so they arrested him for DUI.
Broner was taken to a nearby station where he was awake long enough to take a drowsy mug shot. Bond was set at $1,000 but he's on an 8-hour hold so he'll be behind bars until at least 4 AM on Saturday.
It's just the latest in a string of legal issues for the former prodigy -- he's been accused of sexually assaulting multiple women, assaulting people in public and he's been sued multiple times for not paying jewelry debts.
Broner was once considered one of the best prospects in boxing. He was a champ in 4 weight classes -- and Floyd Mayweather took him under his wing. At one point, he gave himself the nickname "About Billions."
Broner is 33-4 as a pro -- but he hasn't won a fight since 2017. Since then, he lost to Manny Pacquiao and Mikey Garcia ... and fought to a draw with Jessie Vargas.
Originally Published -- 9:28 PM PT 3/13