C.J. Spiller on struggles: I’m overthinking, but not about contract

Bills running back C.J. Spiller heard questions about his drop in production last year when he ran for 4.6 yards per carry after posting a robust six yards per tote in 2012. The questions are coming again. Spiller is down to 3.4 yards per carry and he’s run for just 27 yards on 16 carries…