On September 24, 2008, Lance Armstrong announced that Phinney had made the under-23 team, which was organized by the group that managed Armstrong's , . On March 26, 2009, Phinney won the individual pursuit at the 2009 UCI Track Cycling World Championships and, again, at the 2010 UCI Track Cycling World Championships on March 25, 2010. Phinney then switched his focus to the road, winning the Paris–Roubaix Espoirs, the Olympia's Tour overall, in addition to the first four stages and time trials in Tour de l'Avenir and Tour of Utah.