Jackson, 27, played sparingly for the Browns in 2012, rushing for 54 yards on eight carries — all in the season finale at Pittsburgh. He also caught a pair of passes in the season opener vs. Philadelphia. Those were the only two regular-season games in which he played. In 2011, Jackson appeared in two preseason games for Cleveland before missing the rest of the year because of turf toe.
Jackson, Montario Hardesty, Dion Lewis and Chris Ogbonnaya are the primary contenders for work behind starting tailback Trent Richardson, who received the vast majority of reps in the running and passing game in 2012.
Jackson entered the NFL with Green Bay in 2007 and played four seasons with the Packers. In his regular-season career, he has rushed for 1,383 yards and seven touchdowns on 355 carries and caught 112 passes for 864 yards and a pair of scores.