Things are rarely that cut and dried.
I am less concerned with what other quarterbacks experienced in the past because they are not Haskins.
Yes he only started one year. Brady didn't start that many games at Michigan either.
Now he didn't start in Year 1 but was behind a franchise quarterback in Drew Bledsoe.
Here Keenum is a bridge qb. It's possible he could find a niche as the backup but otherwise he is gone in 2020.
So, as Brian Mitchell said you have to evaluate the player in front of you without biased looks to the past for comparisons.
I am not in favor of throwing Haskins to the wolves but at the same time like Mitchell I question whether Gruden is really doing a fair job of getting him ready or whether his personal animosity over the selection at
#15 and conflict with front office is what is driving the ‘you won't see Haskins any time soon' mantra.
Looking ahead to 2020 I don't know I want Haskins' first start to be in Year 2 of his contract with TWO newly minted tackles as you describe.
Unless we have two top 10 picks and Chris Samuels/Trent Williams types are there in the draft those new tackles are going to take awhile to develop.
So, in the end I don't know that it is not better to fire Gruden now, name an interim like Callahan for the balance of the season and let Kevin O'Connell work with Haskins uninterrupted and start him for a certain number of games.
It could be 4, 6, 8 or as many games he can come in and learn from.
That would be up to O'Connell and Callahan.