Stanford has a depth chart here:
BYU depth chart
Maybe its not totally accurate. Berzins is listed as a starter and Omari Porter at nickel. No Hornibrook, Hinton, Sinclair, Fields, Williamson. No Cooper so I guess a redshirt there. it does list Kelly (who Shaw said might not play) and Dubre. No STM, but does list Collin Wright.
the game notes say;
The Cardinal will honor all fourth-, fifth- and sixth-year seniors on Senior Day and will recognize 28 student athletes prior to Saturday night’s game. • This year’s seniors are:
Bradley Archer, Ethan Bonner, Colby Bowman, Branson Bragg, Levani Damuni, Aeneas DiCosmo, Patrick Fields, Stephen Herron, Elijah Higgins, Jake Hornibrook, Spencer Jorgensen, Jason Kaul, Thunder Keck, Kyu Blu Kelly, Jacob Mangum-Farrar, Jonathan McGill, Ricky Miezan, Barrett Miller, Drake Nugent, Walter Rouse, Ryan Sanborn, Tristan Sinclair, Jay Symonds, Nicolas Toomer, Brycen Tremayne, Salim Turner-Muhammad, Kendall Williamson and Michael Wilson.
I wonder if almost all 28 are not coming back. Surely some 4th years will be back as conventional 5th year guys, but maybe all 5th years and Covid eligible guys are on the way out?
Add in Manley, Lukrich and Harris who left since last spring plus Mckee to the NFL, any undergrad to the portal, maybe a medical retirement and I think its easy to see 25+ guys from the summer not back. Not all of the above are on scholarship, but Shaw better have his portal plan ready to go. He's only got 12 committed high school seniors arriving on campus right now because 2 will be on missions. Seems likely they will add more high school commits though.