 In reaching his tenth goal against the Dallas Stars on December 27, 2006, Liles became the first defensemen in the NHL since Steve Duchesne in 1987–88 to score at least ten goals in his first three NHL seasons.After suffering the disappointment of failing to qualify for the Stanley Cup playoffs for the first time in Avalanche History, Liles helped lead the team return to the post-season in 2007–08.On December 17, 2007, he recorded two helpers against the Los Angeles Kings to surpass 100 career assists in the NHL.