There isn’t much going right with the Detroit Lions’ ground game, but if you’re looking for a spark of hope, look no further than Theo Riddick, who has done well with his opportunities since the team’s bye. In the past five games, Riddick has carried the ball 27 times, averaging 4.5 yards per attempt. It’s putting him in line for a bigger role down the stretch. “I think Theo’s doing a nice job,” offensive coordinator Jim Bob Cooter said. “We’ve seen improvement from him, he’s really working hard at it.