The Kansas City Royals moved within one win of their first World Series crown in 30 years by beating the New York Mets 5-3 on Saturday to take a 3-1 lead in the best-of-seven for the Major League Baseball championship.An error by Mets second baseman Daniel Murphy, their National League championship series hero, on a slow roller by Eric Hosmer in the eighth inning opened the floodgates for the Royals, who turned a 3-2 deficit into a 5-3 lead.The three-run burst against relievers Tyler Clippard and Jeurys Familia negated a pair of home runs hit by Mets' rookie Michael Conforto.Kansas City closer Wade Davis came on in the eighth to register a six-out save, with reliever Ryan Madson claiming the win.The Royals will seek to end the series with a Game Five win in New York on Sunday. A Mets win would send the series back to Kansas City for Game Six on Tuesday."We've been swinging the bats very well. We had a nice night last night and tonight we just didn't get the hits when we needed them, except for Conforto," Mets manager Terry Collins told reporters."If anybody can give me the answers to why we're not hitting in certain situations, I'd like to hear them."