If I can throw my useless 2 cents in here regarding the USC QB situation.
The University of So Cal, being a prestige university generally get 5 star recruits at the skill positions it’s been that way for years! (some of the best of the best receivers in the country) these guys are generally WIDE open, create great separation while running routes from the other teams in their conference with talent not as elite defending.
When these QB’s get drafted to the NFL their WR’s are not open by a mile like they were at the collegiate level as the talent on the defense side of the ball at the pro level is equal to the offense.
EXAMPLE: Ted Ginn, blew the competition away at OSU with his speed. When Ted Ginn (and his family

) got drafted to the NFL, that speed was negated because the defenders were equal or on par with his speed!
(Although he toasted Revis quite a few times…haha…I still hate him and his so called island)
This is also the same to be said about why Ohio State QB’s struggle at the NFL level as well, although I have aspirations for Stroud, he seems like he may prove the narrative wrong, with his strong work regimen.
One big stat on Caleb I looked at was in college, he averaged 3.5 to 4 seconds to get rid of the ball
took 63 sacks in the last 2 years,
this suggests he’s trying to make too many plays on his own and/or his read progressions are not exactly exceptional.
Some aspects in his game will have to be altered for him to succeed. I’m not sure of his dedication and work ethic, but he’s going to have to spend a lot of extra time in the film room.
Personally, I feel the Bears didn’t upgrade as much from Fields as they think they did.
I would’ve kept Fields giving him the upgraded weapons they added in the off season, and traded that first pick for 3 picks in following years to build around.
Jury’s still out on Williams, wish him well, we’ll see how he does,
(Here’s a little tid bit for you fantasy players, I’d draft Cole Kmet at TE, generally rookie QBs bail out throws are to the TE’s
as they are marginally open. He should have a good season)