I will go way out on a limb and state that a stud is Capers.
Sure, Matthews gets kudos for a nice INT and run back, but what a masterful call by the coordinator to have Clay in that position covering that space on a misdirect. I seem to recall a similar pick by Raji in a very important game not long ago.
Also, if HHCD and a host of others make those missed tackles in the backfield like they should have, then credit must also go partially to the coordinator that dialed up the blitz or stunt that actually got them into position to make a play in the first place. A good example is when Clay got pulled down as he rushed Cutler on a key play, but Shields gave up the offsetting penalty instead. Good called alignment, but poor execution muffed it.
So, Capers gets a plus from me.