Not this year but I've been a few times. Great clinic!

I agree. I'm talking more in general terms which is how Rogers described it. You would notice this if the QB left after 4th down and a different player comes in with the same number and lines up as a punter.

The point is, if your regular punter is 18, and your backup qb is 18, you can easily deceive the defense by sending in your backup qb to line up as your regular punter.
The defense is going to assume it's a punt and defend accordingly.

OTOH, at the college level, there shouldn't be any surprises after about week 2.

Which is pretty much what happened in this situation.

How did the QB "sneak" onto the field if he was already on the field? Did he leave with the group, but then turn around and come back?

Pretty easy if he is the 2nd string QB and comes on with the punt team.

Two things... 1 - the OP said it was the starter.

2 - QB and Punter are two different positions ... the rule clearly says you can't have two guys at the same position with the same number during a game. If this 2nd guy actually punted ... THEN you have a broken rule.

Perhaps the rule should be written to also say that two players with the same number cannot take snaps from center during the game. But currently, it does not state this.

The play was run from the punt formation.

1 - Right it was the starter. In this situation there was no substitution. Normally #18 - QB leaves and #18 - P comes on the field for 4th down punts but in this play #18 - QB stays on the field.

2 - Are they though under the rules? The rule has teeth in that the penalty is fairly severe, but it has no structure in that it's basically impossible to enforce since the rules don't define what positions are.

I also agree that it's basically unenforceable by the crew during the game due to the difficulty of confirming the separate identities particularly across long periods of time.

In the end I think it's a good idea turned into a badly written rule. I think this should be a violation but it's not entirely clear whether it is or not and even if it is, it would take an extraordinary effort by the crew to get it.

So ... given the situation you describe - and assuming you think some violation of this rule occurred --- exactly when do you penalize?

A18 QB's plays 1-3 of a series, then the other A18 comes on and punts. Penalty then? I suspect you're saying no. It's clear QB and punter are different positions.

Later, A18 QB's plays 1-3 of a series, then stays on the field for 4th down as several other substitutions occur, and then lines up a bit deeper but plays ... quarterback, like he did the rest of the game ... and throws a pass. Penalize then? Sounds like that's when you want the penalty to occur - but how is a QB staying on the field to play QB a violation of this rule?

Yes - the entire fault in all this is the poorly worded rule and the lack of definition or even caseplay to go by. But if the rule was worded correctly, I still don't see a foul here (perhaps if the rule was worded differently, the foul would actually be when the punter came out the first time and punted.)

I'll remind you that I am not a football referee.

The prohibition on offense should be on eligible receivers wearing identical numbers during the game. I believe that would solve this problem (and the foul would be when the punter took the field in this revised instance).

Now, in this case I would stipulate the following assumptions:
1. The intent of the rule is to prevent misidentification between players.
2. Punter is a position which is occupied by the player who usually punts the ball in a scrimmage-kick formation.
3. Quarterback is a position which is occupied by the player who typically receives the snap in a non-scrimmage-kick formation.

If we take these stipulations as true (and you may well not), the rule is violated when #16-QB takes the position of punter.

In reality, you've convinced me this rule is all together unenforcable and needs completely rewritten.

Again at the college level you might have multiple scholarship players that might have same numbers and this is not every going to be an issue. I also think the rule is so that you do not throw out the same CB that might have the same number as well. The offense needs to identify defensive players theoretically too.

As stated, I think this rule is more administrative in nature, meaning that if any penalty is going to come, it will come from a league or conference to enforce some sanction. Otherwise right now there does not seem to be a subscribed penalty to give if we notice two players are at the same position.

Peace

Exactly this.. imho.

I didn't see it.

Wait, here it is.

The subscribed penalty is on FR-21 of the 2013-2014 Football rulesbook

Coaches response: "But he's NOT my punter, he's my quarterback. We're in shotgun!"/ "He's not my quarterback, he's my punter" "can't you see we're in scrimmage kick formation?!" "$#@^%$, I'm calling the conference office tonight!"

They should just mandate unique numbers for different players in the game and allow 3 digit numbers. The 3rd digit should come after the decimal point.