Mike Reiss of ESPN Boston answered a question about Lawrence Maroney:
I agree that Maroney stepped up when the Patriots were hit by injuries in 2009, although his overall season was clouded by four lost fumbles (two at the goal line). I thought he was the team's most consistent running back in terms of being available -- and that shouldn't be overlooked, especially for a player who has had some injuries in the past.
He's also still young (25). As for the fumbling, Maroney points out that has traditionally been one of his strengths and he hit a rough stretch last year, so he needs to sharpen his focus in those situations. That has been part of his offseason approach.
It's really hard to predict what role Maroney will have this year. Like Mike Reiss said, fumbles really hurt him last year just when he became a reliable fantasy back. He's projected to be ahead of Fred Taylor, Kevin Faulk and Sammy Morris on the depth chart.