Five years after creating W Partners with the owners of the Chicago Cubs, the Ricketts family, Wally Hayward sits in the team's sleek new headquarters that overlooks one of his sales and marketing agency's signature deals: Gallagher Way, the 50,000-square-foot entertainment plaza built adjacent to the remodeled Wrigley Field. Hayward, the well-known former Cubs executive and current W Partners chief executive, didn't design the plaza that on this July morning during the All-Star break still...