By Jennifer Piacenti The Astros are favored at SI Sportsbook against the Phillies as the World Series heads to Philadelphia for Game 3. The 2022 World Series heads to Philadelphia for Monday night’s contest. The series is even at 1-all after the Astros rode a strong start from Framber Valdez and held Bryce Harper hitless on their way to a 5-1 victory Saturday night. By winning the first game in Houston, the Phillies now have home-field advantage for the series. That advantage looms large as Philadelphia has yet to lose a postseason game at home (5-0). Not only that but the Phillies are 21-9 al…