Christian Colon, the backup infielder for a Royals team that plays in the American League, hadn’t stepped inside the batter’s box this entire postseason. He hadn’t seen a live pitch in 28 days, and hadn’t driven in a run in six weeks. Then Royals manager Ned Yost approached Colon at the start of the 12th inning in Game 5 of the World Series from Citi Field and told him to grab a bat. He felt ready.