Traditionally, quarterbacks win this award.
When Alexander won it, he rushed for 1,880 yards and 27 touchdowns. He was never much of a pass-catching threat out of the backfield, and he only had 15 receptions for 78 yards and one touchdown in 2005. The league's best passers that season in terms of scoring were Carson Palmer and Peyton Manning, with 32 and 28 touchdowns, respectively.
When Tomlinson won it the next year, he rushed for 1,815 yards and 28 touchdowns. He also caught 56 passes for 508 yards and three touchdowns. Manning and Palmer were once again the top quarterbacks in terms of touchdowns, with 31 and 28, respectively.
To this point in 2012, Peterson has already rushed for 1,818 yards and 11 touchdowns. He, like Alexander before him, has never been a dangerous receiver out of the backfield, and he has caught 38 passes for just 211 yards and zero touchdowns so far this season.
So, how does Peterson compare to the other players worthy of MVP consideration after Week 15?