More trouble for Kareem Hunt ... the Cleveland Browns running back was pulled over Tuesday for speeding in Ohio -- and cops say they found weed in his car.
Cops initially pulled over the 24-year-old around noon when they saw him speeding in Rocky River, OH ... just outside of Cleveland.
During the stop, the officer smelled weed coming from Hunt's car and conducted a search that turned up "small amounts of marijuana" in a backpack on the back seat.
The weed was seized as evidence -- but he was NOT cited for the pot.