So, after the starting quarterback figures out the defenses, figures out their weaknesses, knows when to throw and knows when to hand-off, gets on the same page with all of his receivers as to which routes to run and how to run them based on figuring out the defenses, you’d yank the two starting quaterbacks in the fourth quarter and put in two new quarterbacks who haven’t played a snap yet?
That’s equivalent to playing a chess game, and about 75% through it, substituting the current chess players with two new ones who’ve been waiting in another room.
#1, these are professionals, after all...and knowing when to throw & when to hand-off tends to come both in practice, the exhibition games & all preceding other games.
#2...re: "figuring out the defense" & "figuring out their weaknesses..." well, if you have to be an "in-the-game" QB to do that, then why bother EVER -- at ANY level (college, high school, pros) have either some offensive play coordinator or sideline coach call a play?
You make it sound like nobody on a sideline or in a pressbox seat could possibly "figure out" a defense or its weaknesses?
That's gotta be one of the more pathethic, unthought thru comments to float around.
...gets on the same page with all of his receivers as to which routes to run...
Uh, yeah. Each QB does that pre each play. (It's called a "huddle"). And that "huddle" is based upon extensive practices further fleshed out via those exhibition games & previous games I mentioned above!