Here is a short video of Cowboys' LB coach Matt Eberflus (and Ryan's best friend) on Rob Ryan's defense: VIDEO
---May have anywhere from 4, 5, or 6 LB's on the field at one time to handle the spread offenses.
---Adds speed on the field to match their offensive speed
---Moves LB's around, disguising coverages on the snap, not prior to the snap
Also, a great Victor Butler article interview on Rob Ryan's scheme: the basic concept is to create mismatches
I count 3 speedy LB's on the Saints roster right now. I know it's rare for SP to address the LB position with elite LB's, but my guess the 15th pick will produce one. But even if they trade back, I expect some other LB with speed will be added via this draft.