"We've had communication," Jack added. "On my end, everything is clear. I completely understand where he's coming from and I think on his end there's more important things he needs to take care of in his life than the game of football, which I respect. I think that's great because it's hard for a lot of people to walk away from this game. The way he's doing it on his own terms, you got to respect it. I'm definitely going to miss him out there."