From just looking at the roster,
Sims
Purdy
Borders (Good player but probably looking for more playing time)
Lynum (Has been great on specials & in mop-up duty this year but will be a senior and probably looking for a guaranteed starting spot)
Bonner (Rhule/Satt kinda fucked this guy's career up, I can see him losing 20 pounds & playing WR at JUCO)
Jeudy (Has played decently for us but probably looking for a guaranteed starting spot & there are younger, better guys behind him)
Kaine Williams (Just isn't a fit & has struggled to get on the field)
Kpai (Has struggled to gain weight & tbh, I wasn't blown away by him in high school. If we're playing 200 different linebackers a game and he still can't play, that's a bad sign)
Rahmir Stewart (A player told me he showed up really out of shape, obviously that doesn't mean much & he can still lose weight, and become a good player but yeah lol)
Snodgrass (Everyone says how much of a great guy he is, which is probably true but he can go be a great guy at South Dakota. Probably the worst take in Nebraska history. I highly doubt he leaves, for whatever reason Nebraska loves keeping in-state scholarship kids that suck and need to be forced into the portal)
Jeremiah Charles (Wager guy)
Smith Flores (Wager guy)
Brice Turner (Track guy that was a project from the beginning, could be easily recruited over, could leave football to focus on the track team)
Corcoran (Every offensive lineman got better as the season got on except him, then he got injured. The worst blindside protector in college football. He can go redeem himself at Colorado State or Tulsa.)
Gunnerson (Playing time has decreased as the season got on. One of Frost's "all flash & bravado in warmups but is fucking trash when the game starts" players)
Will all these guys leave? Maybe not. There are some guys I didn't list who might leave as well.