How concerned should you be about the durability of running backs like DeMarco Murray and C.J. Spiller? Adam Ronis and Scott Engel discuss Adam’s PPR rankings and give their views on injury concerns for these running backs and others. The RotoExperts are on Sirius/XM Fantasy Sports Radio (Sirius 210, XM 87) weekdays from 6 to 11 am ET and weekends from 6 to 9 am ET. The 6 to 9 am ET weekday block is also simulcast on the Fantasy Sports Network.