After an extraordinary and lengthy career, Rickey Henderson was just elected to the Hall of Fame, which should surprise no one--Bill James said you could split him in two and you'd have two Hall of Famers. Nonetheless, he did not secure a unanimous vote, which leaves me to wonder if anyone can. Joe Posnanski thinks Greg Maddux has a shot:
"His Hall of Fame call is five years away, but I’m already making the prediction: Greg Maddux will finish with the highest percentage in baseball history. And he has a shot at unanimous — I say he gets within five votes of unanimous."
It is difficult to imagine how a voter could exclude Maddux, on his merits, on the first ballot, but it's easy to imagine a voter ignoring the merits and opposing based on other motives.
With that said, there are at least two active players who might join Maddux in warranting a unanimous vote:
Alex Rodriguez--His fielding and hitting stats are superb across the board, but some voters will oppose his election if he fails to win a World Series. They may also vote against him for ambiguous character issues.
Albert Pujols--His hitting numbers are stellar, almost unparalleled, he has won a World Series, and his character appears solid, but it remains to be seen whether he can sustain such a prodigious output into his mid- to late-thirties.