The Pats have run a lot of 4-3 this year because when the sit back in their standard 3-4 they have been shredded. The results in the 4-3 are not much better but it is their attempt to put a faster unit on the field. I am beginning the think the 4-3 will be run with more frequency to allow speedier players to combat the NFL air attacks. If this is the case the entire front seven needs to be evaluated. Mayo was the first of these newer smaller LBs, but the Pats may not be done.