Baltimore, MD – Billy Cundiff made five field goals and Joe 14.
Flacco completed 20-of-33 passes with a rushing score and Ray Rice ended with 101 yards on 23 carries for the Ravens (4-1), who have won three straight games.
Anquan Boldin led all receivers with 132 yards on eight receptions and Ricky Williams added a late rushing TD for Baltimore.
Matt Schaub ended 21-of-37 for 220 yards and a touchdown for the Texans (3-3), who have lost three of their last four.
Jacoby Jones totaled 76 yards and a score on four receptions, but Arian Foster was limited to 49 yards on 15 carries in defeat.
