Here is how they ranked for last year based on a basic RC formula per game(for all you guys that don't like PA). This disregards what stadium they played at. Arod is 10% better than everyone else, with Giles, Renteria, and Boone in the next pack.

0.85 Alex Rodriguez
0.77 Marcus Giles
0.76 Edgar Renteria
0.75 Bret Boone
0.72 Nomar Garciaparra
0.71 Alfonso Soriano
0.70 Jose Vidro
0.69 Jeff Kent
0.68 Derek Jeter
0.66 Orlando Cabrera
0.64 Rafael Furcal
0.63 Ray Durham
0.63 Miguel Tejada
0.62 Luis Castillo
0.62 Mike Young
0.61 Angel Berroa