Adidas has added two more athletes - Jess Roskelley and Kyle Vassilopoulos - to its U.S. team of sponsored climbers. They will represent the brand at local, national and international events. Roskelley is the 30-year-old son of another mountaineer, John Roskelley. Back in 2003, he established a world record as the youngest American to have reached the summit of Mount Everest.