After fumbling against the Bills, should Stevan Ridley remain the New England Patriots’ lead running back? | masslive.com September 11, 2013 by Mike Dussault After fumbling against the Bills, should Stevan Ridley remain the New England Patriots’ lead running back? | masslive.com Perspective is good… Over his first two seasons, Minnesota’s Adrian Peterson coughed up the ball 20 times over 915 rushing attempts, an average of once every 46 carries. Ridley currently averages one every 64 carries.