By STEPHEN HAWKINS (AP Baseball Writer) HOUSTON — Yordan Alvarez hit a towering, go-ahead homer and the Houston Astros clinched their second World Series title in six seasons and got Dusty Baker his first crown as a manager, beating the Philadelphia Phillies 4-1 in Game 6 on Saturday night. Alvarez blasted a three-run drive in the sixth inning immediately after Phillies starter Zack Wheeler was pulled with a 1-0 lead. As Alvarez’s 450-foot drive disappeared, Astros starter Framber Valdez jumped and wildly screamed in the dugout as fans in the crowd of 42,948 went into a frenzy waving their orange...