I always liked Ridley outside of the fumbles. Not sure how explosive he will still be after knee surgery.
His fumbling issue is overblown it was bad for a Pats RB, but not compared to the rest of the league(especially the Lions) 9 fumbles in 712 touches for comparison Ameer had a league worst fumbling ratio 5 fumbles with 168 touches last year. Hopefully his knee is okay it would be really nice to have a guy that can get more than 1 yard per carry during clock killing time.