First String RB: Arian Foster. No one had him even close to the top 20 running backs before this season began.
Week one, he ripped the Indianapolis Colts' defense to shreds, rushing for 231 yards and three touchdowns. On the season, he has a league best 13 touchdowns, and is second in rushing yards with 1,230.
Second String RB: Adrian Peterson. This was hard to pick, but I went with AD because of his yards per carry (YPC) and the fact he had more touchdowns than my other options.
He's been hampered by fumbles since his career began, until this season. He's only one of two running backs to not fumble at all this season (850 or more yards).
He has 1,123 yards and is tied for second best in the league with 11 touchdowns.
Third String RB: Michael Turner. The third and fourth string could be flip-flopped, but I decided this based on Turner being the other top running back with no fumbles.
He's one of the major reasons the Falcons are having so much success, tied for second best in the league with 11 touchdowns and fourth in rushing yards with 1,174.
Fourth String RB: Chris Johnson. A huge disappointment when it comes to what the expectations were, but there's no doubt that he is a top running back in the NFL.
With a fifth best 1,137 rushing yards, and sixth most 10 rushing touchdowns, he's obviously not going to hit 2,500 or even 2,000 for that matter, but he is still a great player.