NFL STAR BEATS UP ROOMMATE

Cincinnati Bengals running back Cedric Benson  allegedly beat up his roommate so badly this weekend, the victim thought he was missing teeth ... this according to the police report obtained by TMZ.

The roommate, Charles Clavens, told police he was standing on a street corner in Austin, Texas yesterday ... when "he was approached by a hostile and aggressive Benson who told Clavens they needed to talk about their problems."