Every time an undeniably great baseball player retires -- the latest being Mariano Rivera -- there will be a handful of people who will wonder:Is he finally the one? Will he become the first unanimous Hall of Famer? In a way, it’s a bizarre concept. How could there have never been a unanimous Hall of Famer? I don’t know a single person who does not consider Mariano Rivera a Hall of Famer. You could invent cockamamie arguments against Rivera if you want -- he wasn’t effective as a starter briefly at the start of his career, one inning closers are vastly overrated, whatever -- but that’s just like a thought exercise. Everybody willing to look at his career with even the slightest bit of objectivity thinks Mariano Rivera should get elected into the Hall of Fame.