Help me out Milani - how does a formation with 2 RBs in the backfield affect an end around? Use the RBs as blockers? That seems like a way to give away the play call. Not sure, lemme know what you're thinking. Thanks!
Screens. That is where the difference enters. Holmgren, RB, FB, ran excellent screens. The second back is a second option. Who gets the pass? Who becomes the blocker? Or who becomes the decoy? Linemen have to pull. A back can be in motion, can lineup in the eye, or split.
Lombardi used misdirection, but rarely an end around. Defenses knew Lombardi wanted to run the ball either by the sweep or the quick opener. The screen or the swing pass acted as an alternative ploy against heavy box run defenses. In the 1962 Championship it moved the ball because it was way too windy to throw strikes downfield. All of Lombardi's backs were good blockers or they would not be on his team.
And if you watch the formations, even on 3rd and 10 or 3rd and 15 they still used 2 in the backfield.
Nowadays, they go empty backfield or just a single back to block or pan to the flat so they can lineup with 3 or 4 wideouts. In Lombardi's time the second back was almost automatically a receiver on passing downs, running wheel routes or flying down in between the safeties.
And Lombardi used the halfback option pass off that formation because teams anticipated a sweep. He used it not only with Paul Hornung but with Tom Moore, Elijah Pitts, and Earl Gros. In 1967 he could not use it because of all the RB injuries and new players.