Also, for historical fun, would be interested in what PB ran in the 80s and 90s. I can't imagine he ran this sam philosophy back then. It looks like something he has adopted for use against today's offenses.
I'm an idiot when it comes to these things, so help me out: why is this not called 3-2-6?
I always thought the first number was referring to the DLs, 2nd number was LBs, and the third was the DBs. PB claims a 4-2-5, but this illustration only portrays 3 DLs.
I imagine this has something with how these "spacebackers" lineup and position themselves, but would love some clarity/