Boxing superstar Adrien Broner turned himself into cops in Ohio this morning ... for allegedly beating and robbing a man outside a bowling alley with a gun.
TMZ Sports broke the story ... Broner was charged with felonious assault and aggravated robbery in mid-March ... and a warrant was issued.
Broner arrived at the Hamilton County Sheriff's Department Monday morning ... where he was processed and released after posting $100k bail.
AB posted on Instagram immediately after, saying "They let me out y'all.... #AboutBillions #ImGood".
FYI -- Broner fought in the Premier Boxing Champions on Friday night in D.C. He knocked out opponent Ashley Theophane in the 9th round.