How many "legit" number 1's are there in the league right now?
Hard to say without taking a look.
Really what is going on is we are splitting hairs over semantics.
If we are being strictly technical, then all 32 teams have a "#1 WR", but this argument would be made in bad faith by anyone trying to attempt it, as we all know of situations on NFL teams where backup level players have started for teams.
I give my definition as a Baseline And I think it is a fair one, although I do accept your caveat that it is possible in some cases for a number one wide receiver to be covered by a single cornerback if that cornerback is also on the same level at their position.
But when we get to that point, we are talking about the best in the game. You kind of know it when you see it, like the famous battles between Megatron and peanut. Most cases are not that.
I do think in general, however, that's when most people talk about a legit number one wide receiver, they are talking about the rare handful of pro bowler / future hall of fame wide receivers who can take over a game. And not just one game once in awhile, but almost every game, game in and game out. I think for most people, when they say a legit number one, that is what they think.
However by that definition, that also means there are very few of those in the league, much like the same standard of franchise quarterback. For instance, Andy Dalton can be considered Cincinnati's franchise quarterback. However Andy Dalton is not a household name and therefore in most people when they hear franchise quarterback, they do not think of Andy Dalton. Similarly, I think when people hear number one wide receiver in most cases, they are not thinking of starting number ones but the best wide receivers in the game.
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