The statistic "Batter-Fielder Wins" attempts to show exactly how many more (or less) wins a position player got for his team compared to an average player. This overall statistic takes into account batting, fielding, and base running statistics. Among the strengths of this number is that it's adjusted to the context of league levels and also adjusted for park factors (like playing your home games at Coors.)

The career leaders:

1. Barry Bonds 124.7
2. Babe Ruth 112.0
3. Nap Lajoie 95.2
4. Ted Williams 86.5
5. Rogers Hornsby 86.0
6. Ty Cobb 85.7
7. Willie Mays 84.4
8. Hank Aaron 83.0
9. Tris Speaker 82.7
10. Honus Wagner 82.2

This stat doesn't take into consideration how many games a player played in order to help his team win which is why I would call this list "most valuable" and not "best" this is why someone like Hank Aaron is ranked so highly, Aaron played 3298 games (3rd most all time) while Honus Wagner played 2794 (21st all time), clearly Wagner would have easily passed Aaron if he had played more games. But you can't be valuable for your team if you aren't playing. So having a long and consistent career is rewarded with this ranking.

What other active players (other than Bonds) are in the top 100 most valuable position players in history?

23. Alex Rodriguez 52.5
27. Frank Thomas 49.5
29. Ken Griffey Jr. 46.8
45. Mike Piazza 42.6
45. Gary Sheffield 42.6
49. Ivan Rodriguez 42.1
56. Manny Ramirez 39.5
69. Scott Rolen 37.4
72. Jeff Kent 36.7
78. Jim Thome 35.9
81. Jim Edmonds 35.6
85. Vladimir Guerrero 35.2
97. Craig Biggio 32.9

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