Williams was released on Saturday by the Washington Redskins, which signed him last year as an undrafted free agent out of LSU. Williams rushed for 261 yards and three touchdowns on 65 carries in 2010. He also picked up 309 yards receiving and two touchdowns on 39 receptions.
The move to add Williams doesn't come as a huge shocker. He weighs 230 pounds and is expected to fill the power back type of role in the Lions offense. He joins Jahvid Best, Maurice Morris and Jerome Harrison in the backfield and helps fill the need that was created when Mikel Leshoure went down for the season.