As Week 5 approaches, some highly speculated backfields from the preseason start to finally take their shape. It seems as if every year, the running back position in fantasy football becomes increasingly challenging to navigate in the offseason.These days, teams now view the position as interchangeable as ever. It appears the days of "workhorse" running backs are long gone, and teams are implementing more of a "hot-hand" approach.With a four-week sample size under our belt, we wanted to take a ...