St. Louis Rams running back Steven Jackson did not practice Friday and remains questionable for Sunday's game against the Chicago Bears with a groin injury, Dan O'Neill of the St. Louis Post-Dispatch reported.
O'Neill's story on the matter focuses more on the unknown quantities that are the three backs behind Jackson on the Rams' roster. All three are rookies: Daryl Richardson, Isaiah Pead and Terrance Ganaway.
Only Richardson has yet to receive an NFL handoff; he had 15 carries for 83 yards in Week 2 against the Washington Redskins, the game in which Jackson suffered the groin injury. Richardson was a seventh-round draft pick out of Abilene Christian.
Pead, a second-round draftee from the Cincinnati Bearcats, has two kickoff returns but has not touched the ball from scrimmage. Ganaway was drafted in the sixth round by the New York Jets, but the Jets waived him on Aug. 31, and the Rams claimed him off waivers the next day.
Bears running back Matt Forte was ruled out for Sunday's game with an ankle injury. The Bears will look to backup veteran Michael Bush to carry the load Sunday.
The Rams kick off against Chicago on Sunday at noon CT on Fox.