Friday night's game between the Los Angeles Dodgers and St. Louis Cardinals at Busch Stadium should be sponsored by the letter K, because there figures to be more than a few strikeouts. If young right-handers Walker Buehler of the Dodgers and Jack Flaherty of the Cardinals pitch on Friday as they did Aug. 22 when they faced each other at Chavez Ravine, runs and solid contact might be at a premium in a game dripping with pennant-race pressure. Buehler (6-5, 3.09 ERA) fired seven shutout innings in that game against the Cardinals last month, permitting just three hits and two walks while whiffing nine.