BOSTON — Just when it seemed Michael Wacha had cracked, the St. Louis Cardinals began scooting around the bases and tied the World Series. Wacha beat John Lackey in a matchup of present and past rookie sensations, and this time it was the Cardinals' turn to take advantage of sloppy fielding as St. Louis topped the Boston Red Sox 4-2 Thursday night to even the Series at a game apiece. David Ortiz put Boston ahead in the sixth inning with a two-run homer just over the Green Monster in left, ending Wacha's scoreless streak at 18 2-3 innings — a rookie record for a single postseason.