For NL ROY, go with Buster Posey

Buster Posey has been excellent for the Giants this year. Getty Images

Ten years from now, we might say that the 2010 National League rookie class was the best to ever enter the game.

Consider this: Gaby Sanchez, Tyler Colvin, Chris Johnson, Starlin Castro, Neil Walker, Pedro Alvarez, Jose Tabata, and Ike Davis all made fine debuts as hitters.

Jaime Garcia, Jhoulys Chacin, Madison Bumgarner, Hisanori Takahashi, Mike Leake, Barry Enright and Dan Hudson have all had solid rookie seasons on the mound.

We haven't even mentioned Stephen Strasburg or Aroldis Chapman yet; John Axford looks like a legit relief pitcher for the Milwaukee Brewers, and Mike Stanton has 20 homers in 361 plate appearances for the Florida Marlins.

However, the 2010 NL ROY race is going to come down to two guys: Jason Heyward and Buster Posey. Let's break that one down.