1st - Wade was/is a huge fan of Under. Its his bread and butter.
2nd - An under requires a fast, penetrating 3T. Donald fits the bill.
3rd - The under is susceptible to a running QB
4th - the over is more a 4-3 defense that allows the 3T to be more aggressive
So what am I getting at? It may be a coincidence that the Rams are running a lot of Over fronts, because they are keeping running QBs Prescott and Wentz inside the pocket.
Or Staley realized what I thought all along. Let AD hunt. Its harder to do that from such a disciplined under, and so much easier to get after it from an over. (as long as you have aggressive safeties.)
Don't waste your time looking back, you're not going that way. - Ragnar Lothbrok