Mauricio Pochettino has called in a youthful group for the upcoming friendlies. Here are the big takeaways It was reasonable to expect that Mauricio Pochettino’s first United States squad after this summer’s World Cup would turn the page for a new cycle. Instead, given the youthfulness of his selections, even a fast-forward reference feels like too dated a reference. Cavan Sullivan is poised to make his US senior debut, with the 16-year-old chosen for Pochettino’s 28-man squad for the September…