During the 2011 season, Buffalo Bills running backs Fred Jackson and C.J. Spiller - functioning essentially in the role of one running back, with Spiller only seeing significant carries when Jackson got hurt - combined for 1,495 rushing yards and 10 rushing touchdowns, 5.4 yards per carry, 711 receiving yards and two more receiving touchdowns.
That level of production - again, the vast majority of which came from the two playing one specific role - was good enough for SB Nation's Ryan Van Bibber to place the Bills at No. 7 on his running back rankings. Note that the rankings do not factor in the word "tandem"; they merely rank running back situations.
The Bills rank behind Houston (Arian Foster and Ben Tate), Carolina (DeAngelo Williams, Jonathan Stewart and Mike Tolbert), New Orleans (Darren Sproles, Mark Ingram and Pierre Thomas), Chicago (Matt Forte and Michael Bush), San Francisco (Frank Gore, Brandon Jacobs, Kendall Hunter and LaMichael James) and Baltimore (Ray Rice) on the list. Our question for you, of course, is this: should the Jackson/Spiller duo have been ranked any higher than they were?