Nah. Base 4-2-5 principles is a 1 gap scheme. Tennessee was running Duo against our 4-2 box. Looks like we were running man coverage to the two receiver side and Cloud coverage to the Tight End/Wing. Duo uses the same blocking rules as Zone - covered to uncovered to backside backer. Basically if you're covered block the guy covering you, if you are uncovered combo the guy to your play side, if the combo overtakes then the initial covered will work up to second level defender (backers). The only movement on the defensive line was from Phillips who slanted from a 3 to a 1 post snap which had both defensive tackles clog A Gaps. It looks like they are back fitting the backers in order to allow Poyer to be a coverage player and not have a run fit responsibility to the Tight End/Wing side while also allowing for Taron Johnson to be an unblocked B gap fitter he was just late to fold.
Here is the blocking scheme:
Here's how we fit it: