Handcuffing Arian Foster and Chris Johnson, but at what cost?
If you are in a draft and get Foster or Johnson in the first round, then once you have filled out all of your starters, then you should look to add Tate or Ringer as insurance.
That pretty much goes for just about any first or second round RB.
Here are the top 13 RB's and their cuff buddies, in not particular order:
Adrian L. Peterson
Chris D. Johnson