In naming Executive Vice President David Zuchowski as the next CEO of its U.S. operations from Jan. 1, Hyundai turned to one of its top salesmen to battle Toyota Motor Corp. to Ford Motor Co. in the country. He'll replace John Krafcik, 52, who in his five-year tenure as U.S. chief oversaw Hyundai gain the most market share among major automakers until late 2012, when it began ceding back some of those gains.