Here's what makes your thinking sink like the Titanic. Some losing teams SOMETIMES do have more passing yard than the winning team and it comes at garbage time, BUT you don't lead the league in passing from what a QB gets from garbage time. Second, Prescott leads the league in pass completions of 20 or more yards and TD's of passes 20 or more yards. I think it's funny, not ha ha funny that when the Cowboys lose like the packers game you want to put everything on Prescott and say nothing about the defense allowing 34 points and FOUR rushing TD's. Or the vbills game where the defense gave up an average of 5.9 yards per play and a total of 426 yards. According to you it's just Precott's fault.
Now I'll give you a time when a QB didn't lead the league in passing or had the #1 offense in the league but had a running game each week. the 2016 Cowboys that ended up 13-3. Prescott has gotten most of his passing yards this season due to the fact that half of their games the running game was subpar or nonexistent leaving just the passing game to try to win with.
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Wow, you just don't get it.
You want to count a ton of yardage against the worst defenses in football and try to equate it to what other quarterbacks are doing. You want to give credence to passing yardage in a game that Prescott FAILED to keep up with the Packers for two quarters, then racked up big numbers once the game was already decided and the Packers were just trying to keep the clock moving.
Against the good defenses Dallas has played, what's he done? New Orleans, New England, Buffalo......?
Oh, yeah, he had 355 FREAKING YARDS against Buffalo, in perhaps one of the worst performances of his career. Again, yardage means diddly squat.
The problem is this. You have no idea what you're watching. You need these stat sheets to give you some sense of grounding for formulating an opinion of what you saw.
I've seen great passing performances that were 200 yards or less. I've seen Jeff George throw for 400+ and literally lose the game single-handedly.
What do you do when you've got to make THAT throw into a tight window while stepping up into the pocket with the rush on top of you? That is what defines a quarterback, not how many yards he rolls up on the Giants and Commanders with nobody on defense with a single skin on the wall.