You guys are funny. He can't even beat out a journeyman QB but you want to throw him into a game to "evaluate" him better.
I imagine most of you thinking that were apologists for Ryan Tannehill too. If he couldn't do it with Arizona, he can't do it with Miami.
Josh Rosen does not have the telwnt to be a starter plain and simple. He will get lucky to see the field and rightfully so. Scrubs don't get a pass just to justify a bad trade.
These are two separate arguments. If Rosen is put in a position to succeed and does not, that's one thing. If he's not (like in Arizona) that's quite another. The difference this time, as opposed to what happened with Tannehill, is that we actually have a benchmark for that: Fitzpatrick. If Fitz succeeds under the same circumstances that Rosen fails under, then we'll know.
The Tannehill argument will never end, regarding whether he could have succeeded under less than completely awful circumstances.