Five potential X-factors in USMNT's World Cup qualifier vs. Mexico

Jurgen Klinsmann revealed his final 26-man roster ahead of Friday night's World Cup qualifier clash against Mexico, and there's plenty for everyone to get excited about.

Borussia Dortmund starlet Christian Pulisic was named to the roster, as expected, and he was joined by fellow youngsters Julian Green, who impressed during recent friendlies, and Lynden Gooch. Familiar faces such as Jozy Altidore, Michael Bradley and Jermaine Jones also made the squad, but Clint Dempsey was ruled out for the remainder of the year with an irregular heartbeat.

Also back in the team is forward Aron Johannsson, who has been riddled with hip injuries since making his debut in 2013. The Werder Bremen front man has…