The Royals’ magic number for clinching a playoff berth is 142. Yes, yes, it’s waaaaaay too early for magic numbers. But the Royals early-season success is a breath of fresh air for fans who watched the team falter in April a year ago and never get within sunflower-seed spitting distance of the postseason. But the Royals have a 12-7 record and are a game behind the Cleveland Guardians in the…