The big storyline heading into the season was how Philadelphia's four aces would do over the course of the season. While Roy Oswalt has been hampered by injury, the trio of Cliff Lee, Cole Hamels and Roy Halladay have dominated. Where will they land on the NL side?
Overall, the American League has had more depth from an aces perspective. Cutting the junior circuit's list down to five aces was a bit more difficult than the senior circuit's.
You'll notice that I included some honorable mentions. They aren't necessarily my 6-10 rankings as much as I wanted to show some unheralded starters some love.