Here's the very next play after the big pass play first drive:
here Seattle comes out with 2 TE's and we counter with a "big nickel". 3-3-5. Buck - Pur - Dial with Brooks - Bow and Hodges then Tartt comes in as an extra safety. My problem here is the alignment call. To me, Purcell should be in a "1" tech on the weakside instead of the "0". Head up on the center is going to expose the weakside to a run.
Here our 2 DL, Purcell and Dial both don't hold onto their men. Dial shucks his guy off and Purcell also tries to come inside of his man. He needs to hold onto that guy and keep the LB - Hodges, clean.
Buckner is trying to maintain contain, but does it at the expense of setting a hard edge. He needs to accordion that edge to pinch the running lanes. You see Purcell also try and take an inside rush and his man gets free to the 2nd level. The man Dial let go falls into Purcell and takes him out of the play. Bow is trying to get outside to force the run back inside to Hodges.
Because the OL got to the 2nd level it creates a huge lane for the RB. Bethea tries to come back inside because of the huge hole, Tartt needs to recognize these plays faster and come down in run support sooner, as well.
The RB sets up his block for Bethea well and he's gone....