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The first-place St. Louis Cardinals (66-37, .641) face the last-place Colorado Rockies (43-58, .426) at Busch Stadium. The clubs are playing a four-game series at Busch this weekend. St. Louis won a close contest on Thursday night and a laugher on Friday. With a victory this evening, the Cards will secure a series win and likely the day off for a veteran or two in tomorrow's game, which will be played in the afternoon heat and humidity of St. Louis in August.