I remember seeing a video from a player who was talking about how hard it is to get on a team as just a PS player. Once your cut from the team you lose access to all the weights and training staff. You are then on your own to get yourself into NFL shape and you can't just go to your local Anytime Fitness and expect to compete at that high level. If those guys want to continue their NFL careers they're spending a lot of money out of pocket for personal trainers and access to equipment. And then you're hoping that you get onto a team. But if you end up spending a significant portion of that money that you do get paid on trying to make teams and you get stuck on practice squads that's a rough life regardless. Because then those guys have to make themselves available during the NFL season, so it's hard for them to pursue a career outside of football until they decide to give up on it.