IRVINE, Calif. - Cristian Roldan is not the face of the U.S. men's national team, not the midfielder around whom Mauricio Pochettino builds his best lineup, not the player casual fans tune in to see. But at some point during this World Cup, Roldan may be exactly the kind of player Pochettino needs.Subscribe to The Post Most newsletter for the most important and interesting stories from The Washington Post. The United States has already won its group and secured its place in the knockout round. I
