Benson told the team's official Web site following the game that the injury was to his hip flexor, rather than his hip joint, and he believes he'll be OK.
Benson was replaced by Bernard Scott during a drive in which Cincinnati went three and out, not long after Scott scored on a 96-yard kickoff return. Benson came back for the next series just before halftime.
Benson had three 100-yard games in his previous four starts and began the game second in the NFL with 837 rushing yards. He had 22 yards on seven carries before leaving Sunday's game.
The Associated Press contributed to this report