When constructing a bench, Chicago White Sox manager Pedro Grifol keeps in mind a conversation he had in Kansas City, Mo., while the Royals coaching staff constructed their playoff roster. “We’d go back and forth and we’d go through everything, and finally somebody said, ‘Look, there’s no perfect team,’ ” Grifol said Saturday morning. Grifol spent the previous 10 seasons on the Royals staff — they reached the World Series in 2014 and won it the next season — before the Sox hired him in November. “We’ve just got to pick the guys we think are going to mesh together and give us the most versatility and coverage in things we think are important,” Grifol said.