I don't know any of those names so I'm going to assume they are all college football players. Is that okay?
I had some beers with Keifer Sutherland.
All but two were NFL Players. (one was in the NFL but never cracked a real rotation before getting a career ending injury, the other was a head coach) 4 of them will be getting in to the NFL Hall of Fame. All will be in the college football hall of fame if not already.
And yes it's ok. If you don't watch football other than your team, I really don't expect you to know them. But if you want names everyone recognizes:
Pope John Paul II
Regis Philbin
Arnold Schwarzanegger
Sylvester Stallone