That's a perfect number to aim for. Sunday it was 19 (run attempts) to 39 pass attempts. Why not run more, especially with the lead and two very good RBs. I'm mystified.
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They're trying to prevent wasting downs. When the defense is selling out to stop the run, they pass. This is a sound, base strategy when you're not killing clock at the end of the game.
Imagine an example: It's 1st and 10. You have a run called with a pass check the quarterback can switch to. You break the huddle and lineup. The quarterback notices base personnel on defense vs. 3WR, 1TE, 1RB. As the quarterback ducks under center, the defense shifts. Ever D lineman is head up on an offensive lineman. The outside linebackers are also on the line, so your 6 man group (TE included ) have a defensive hat on them. The strong safety has come down into the box. The free safety has shaded to the TE side of the formation and is only 2 steps from being in the box.
Looking at the wide receivers, you note the no. 1 CB is on the sidelines because he is nursing a bad shoulder. You have single coverage across the board. The receiver running a slant is facing a CB 10 yards off the line of scrimmage. The wide receiver running a fade is facing a cornerback playing inside leverage. The wide receiver running a hitch and go is facing a CB known for biting ******* double moves and giving up the big play.
What would you do there? Run or Pass? And if you say Run against an 8 1/2 man box against a 6 man defensive line, I'm going to question your sanity.
That's a little bit of an absurd answer, but that's the basic idea of most audibles. If the numbers are in your favor, you run. If they are not, you don't. If you call slants and the CBs lineup to take away slants, run fades or outs.
Obviously we can go down a rabbit hole, but the short version is the Giants were daring us to throw and selling out to stop the run. 3 incomplete passes aren't appreciably different to 3 carries for 2 yards each.