A couple of these might have involved trades but recently, off the top of my head -- Mason, Thuney, Karras (think how much better off the OL would have been with them still aboard); also Damien Harris, Gilmore, Jakob Johnson, Duron Harmon, Stidham, Brandin Cooks, Elandon Roberts, Akiem Hicks, Logan Ryan, Winovich, Jake Bailey, Malcolm Brown ...
This list is a couple years old but helps illustrate how BB devalued continuity making the roster a turnstile:
Past Patriots on NFL 90-man rosters entering 2022