Here are the top-scoring players overall at each position. This is based on standard scoring in a 5x5 league.
Mixed leagues:
Catcher: Russell Martin, Dodgers // .312, 18 RBIs, 19 runs, 5 SBs
First baseman: Adrian Gonzalez, Padres // .310, 8 HRs, 27 RBIs, 17 runs
Second baseman: Ian Kinsler, Rangers // .290, 9 HRs, 24 RBIs, 19 runs, 4 SBs
Third baseman: Alex Rodriguez, Yankees // .365, 14 HRs, 34 RBIs, 29 runs, 2 SBs
Shortstop: Jose Reyes, Mets // .347, 19 RBIs, 29 runs, 17 SBs
Outfielder: Carlos Beltran, Mets // .348, 7 HRs, 25 RBIs, 19 runs, 5 SBs
Outfielder: Torii Hunter, Twins // .330, 6 HRs, 20 RBIs, 20 runs, 6 SBs
Outfielder: Vladimir Guerrero, Angels // .359, 9 HRs, 29 RBIs, 16 runs
Starting pitcher: Josh Beckett, Red Sox // 6-0, 2.72 ERA, 35 K
Starting pitcher: Roy Halladay, Blue Jays // 4-0, 2.28 ERA, 0.89 WHIP
Starting pitcher: Jake Peavy, Padres // 3-1, 2.06 ERA, 46 K
Relief pitcher: Al Reyes, Devil Rays // 10 saves, 18 K, 1.29 ERA, 0.57 WHIP
Relief pitcher: Francisco Cordero, Brewers // 10 saves, 19 K, 0.00 ERA, 0.79 WHIP
NL-only:
Catcher: Russell Martin, Dodgers // .312, 18 RBIs, 19 runs, 5 SBs
First baseman: Adrian Gonzalez, Padres // .310, 8 HRs, 27 RBIs, 17 runs
Second baseman: Kelly Johnson, Braves // .323, 5 HRs, 15 RBIs, 3 SBs
Third baseman: Chipper Jones, Braves // .318, 10 HRs, 22 RBIs, 24 runs
Shortstop: Jose Reyes, Mets // .347, 19 RBIs, 29 runs, 17 SBs
Outfielder: Carlos Beltran, Mets // .348, 7 HRs, 25 RBIs, 19 runs, 5 SBs
Outfielder: Barry Bonds, Giants // .348, 9 HRs, 21 RBIs, 19 runs
Outfielder: Adam Dunn, Reds // .270, 8 HRs, 16 RBIs, 22 runs, 6 SBs
Starting pitcher: Jake Peavy, Padres // 3-1, 2.06 ERA, 46 K
Starting pitcher: Tim Hudson, Braves // 3-0, 1.40 ERA, 0.91 WHIP
Starting pitcher: John Maine, Mets // 4-0, 1.35 ERA
Relief pitcher: Francisco Cordero, Brewers // 10 saves, 19 K, 0.00 ERA, 0.79 WHIP
Relief pitcher: Takashi Saito, Dodgers // 8 saves, 17 K, 1.84 ERA, 0.68 WHIP
AL-only:
Catcher: Joe Mauer, Twins // .354, 14 RBIs, 18 runs, 3 SBs
First baseman: Justin Morneau, Twins // .270, 6 HRs, 17 RBIs, 18 runs
Second baseman: Ian Kinsler, Rangers // .290, 9 HRs, 24 RBIs, 19 runs, 4 SBs
Third baseman: Alex Rodriguez, Yankees // .365, 14 HRs, 34 RBIs, 29 runs, 2 SBs
Shortstop: Jhonny Peralta, Indians // 6 HR, 22 RBIs
Outfielder: Torii Hunter, Twins // .330, 6 HRs, 20 RBIs, 20 runs, 6 SBs
Outfielder: Vladimir Guerrero, Angels // .359, 9 HRs, 29 RBIs, 16 runs
Outfielder: Grady Sizemore, Indians // 5 HRs, 12 RBIs, 24 runs, 9 SBs
Starting pitcher: Josh Beckett, Red Sox // 6-0, 2.72 ERA, 35 K
Starting pitcher: Roy Halladay, Blue Jays // 4-0, 2.28 ERA, 0.89 WHIP
Starting pitcher: C.C. Sabathia, Indians // 4-0, 3.38 ERA, 44 K
Relief pitcher: Al Reyes, Devil Rays // 10 saves, 18 K, 1.29 ERA, 0.57 WHIP
Relief pitcher: Francisco Rodriguez, Angels // 10 saves, 22 K, 2.70 ERA, 0.98 WHIP