That's a great point about O lineman getting offers on their size. Parker and Collins both have frames that lend themselves to getting bigger and stronger without losing flexibility and mobility, so they're going to be recruited heavier than someone like Gio, who is more effective at his position in many cases. PJ is a great example of this because of the early offers. He was a good player, but in watching him, I rarely saw the dominance that I expected rom his hype.
My son has had a few classes with Parker, and says he does not look at all as heavy as he is listed. Really surprised they have not moved him to guard or tackle to utilize the size, he is tall for a center