Thanks, good explanation. I know about the 6 vets maximum.
I think there are a few instances where this might become relevant for Bills at cutdown day, where Bills have 2 players that they want to keep, a vet and a rookie, but don’t have room for both. Probably wiser to cut the vet (Jackson) and keep the rookie (Strong). I think Jackson would rather sign with Bills than other teams, given familiarity with organization and a Super Bowl contender.