The Philadelphia Phillies’ starting rotation is much too good to be compared to their contemporaries. After signing Cliff Lee to a five-year contract, the Phillies have four starting hurlers as good or better than the rest of the league’s aces. We need a more historical, less comparative context in which to measure their greatness.

How good is this corps, which now features Roy Halladay, Lee, Cole Hamels and Roy Oswalt? All four are among the top 20 pitchers of the past three seasons, according to Wins Above Replacement. Halladay and Lee are the two best pitchers in the game over that stretch. Their prospective dominance far out-strips that of any rotation in the past decade, so we need to go farther back.

Where do the Phillies fall all time? How do they stack up against the best rotations ever? Who comes in atop the list? Read on for the top five starting rotations in baseball history.

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