I think the top 5 now are:

Austin
Britt
Marquez
Cooper
Spruce

As a6th round pick Thomas is not untouchable. He and Williams are going to fight it out for that last spot on the 53. Whichever gets cut if they lose him they lose him. It's how it goes. Hopefully safe on the PS. I think North and McRoberts go on the PS too.