The 2010 NLCS begins this Saturday in Philadelphia between the Philadelphia Phillies and the San Francisco Giants. Both teams bring impressive pitching rotations into the series, highlighted by the Game 1 match-up between Roy Halladay and Tim Lincecum.

Impressive hardly describes each of their first postseason starts during the NLDS.

Halladay, in the first postseason start of his career no less, no-hit the best hitting team in the National League, the Cincinnati Reds, and Lincecum threw a 2 hit, 14k, complete game against the Atlanta Braves. With Cole Hamels and Roy Oswalt looking to take the ball for the Phillies and Jonathan Sanchez and Matt Cain behind Lincecum for the Giants, the match-up between these two teams is all about pitching.

That being said, neither team is without issue. Here are 5 questions heading into the National League Championship Series:

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