Apropos nothing, here are (in my opinion) the greatest individual baseball players at every position.

Catcher
Ivan Rodriguez

1B
Lou Gehrig

2B
Joe Morgan

SS
Alex Rodriguez

3B
Mike Schmidt

OUTFIELD
Barry Bonds, Willie Mays, Babe Ruth

DH
Ted Williams (wasn't a position at the time but the best pure hitter to ever do it)

RH SP
Greg Maddox (fight me)

LH SP
Sandy Koufax

Closer
Mariano Rivera