The two best lefties in baseball? Hard to argue "no."

The two best changeups in baseball? According to accomplished national baseball writer Jayson Stark in his chat today at ESPN.com, "yes."

So who would you take, for one game? How about for the entire season? Or if you were starting a team and could only pick Cole Hamels or Johan Santana?

Santana probably wins in the head to head matchup, given his durability and the two Cy Young Award trophies that are resting on his mantle.

But anyone is is anyone who has seen Hamels pitch knows he has the stuff to match Santana one day. Remember when he struck out 13 in eight shutout innings on the last Friday of the regular season last year to move the Phillies into first place for the first time in 2007?

But let's not get ahead of ourselves. There's a reason Santana has a guaranteed contract that will pay him $137.5 million for the next six years.

But as this season progresses, it's worth watching how they match up. It starts tonight, as the first Hamels-Santana game gets underway.

The dueling aces has been creating buzz all week.

Also in the Archive Files, author/catcher Chris Coste leads a power-packed win over the Astros.