Is It Time for the Giants to Go to a 4-Man Rotation?

Some food for thought:

The combined ERA for Giants' starters Tim Lincecum, Matt Cain, Madison Bumgarner and Ryan Vogelsong: 2.94.

The combined ERA for Barry Zito and Jonathan Sanchez: 4.84.

The combined WHIP for the fab-four: 1.20.

The combined WHIP for the tumultuous-two: 1.40.

The defending world champs climbed to the pinnacle of baseball last season on the backs of their pitchers, especially their fantastic starters.

This season, San Francisco has been fortunate with the emergence of comeback star Ryan Vogelsong, who has secured and steadied the fourth spot in the rotation in place of Barry Zito, who was a liability down t...

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