Once again, the Giants and Cardinals will square off with a National League title on the line. They've met three times before, and their fourth meeting will make the matchup the third-most played NL Championship Series in history. Believe it or not, only Pirates-Reds and Phillies-Dodgers have been played more frequently. Here's a position-by-position breakdown of the two clubs, who have combined to win each of the last four NL pennants.