We’re down to baseball’s final four as the New York Yankees, Texas Rangers, Philadelphia Phillies and San Francisco Giants are set to duke it out—beginning on Friday—to advance to the 2010 World Series.

There are multiple story lines to follow in both the ALCS and NLCS—for example, the filthy pitching matchups between the Giants and Phillies or the possibility of the Rangers making their first ever World Series—and we’ll get to each of those.

For now, let’s tackle some of the basic info for the two upcoming Championship Series.

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