By Nick Selbe If Houston can succeed against Philadelphia with its winning formula, it could be the first team to go undefeated in the postseason. The 2022 World Series is set up to be a true David vs. Goliath matchup. On one side is a team that’s an astonishing seven games above .500 for the postseason; that’s outscored its opponents by 22 runs; and that’s tossed two shutouts so far and has the hottest hitter on the planet. And on the other side is the Astros. Despite having postseason resumes that are more similar than you might have expected, it’s the Astros—with their 19-game advantage in …