Sadly, no. With 90+ people on the roster there are duplicate numbers issued pretty frequently. I think they try to duplicate on opposite sides of the ball, like a RB and LB sharing a number, but even that isn’t always possible.
Once the play starts, there are only three types of offensive players in terms of rules:
- Quarterback
- Eligible receivers
- Ineligible receivers
So he would be considered an eligible receiver, which is what most “skill position” guys are on most plays. (Running backs, fullbacks, wide receivers and tight ends.) Occasionally an offensive lineman will be an eligible receiver.
It is not, no. There are many things both the QB and the receiver need to read about the defense and adjust their route accordingly. One example is a hot read, where if the defense blitzes you have to break off your route immediately to give the QB someone to dump the ball off to.
There’s also finding the hole in the zone, or option routes where you have a choice of three different routes depending on how the defense lines up and then plays you. (Safety playing deep? Run a curl. DB pressing with no safety help? Run a go route. etc…)
And even when you are running a fixed, unchanging route and the defense plays you in a way favorable to that route, you will still make little adjustments to maximize your chances for a completion. Inside coverage? Fade outside. Stuff like that.
On most passing plays in the NFL, both the QB and the receiver are reading the defense and adjusting their pass/route accordingly. That’s why it’s so common to hear “QB and receiver weren’t on the same page” after an incompletion.
Yes, and yes. It depends on what the defense is doing.
There’s also the case where if the QB is scrambling to keep the play alive, generally speaking you should break off your route, turn around and come back to him, keeping roughly the same horizontal position on the field as him to give him someone to throw to. While also getting yourself open, of course.