The emergence of Nick DeLeon, 22, coincides with D.C. United's return to prominence in MLS, according to coach Ben Olsen. United, who face Houston in Leg 2 of the Eastern Conference final Sunday, are in the playoffs for the first time since 2007. (Associated Press)

The emergence of Nick DeLeon, 22, coincides with D.C. United's return to prominence in MLS, according to coach Ben Olsen. United, who face Houston in Leg 2 of the Eastern Conference final Sunday, are in the playoffs for the first time since 2007. (Associated Press)