Nathan MacKinnon didn't really want to hear about how the Colorado Avalanche remain squarely in a win-it-all sort of window and how there's always next year. This is the cold, hard reality: MacKinnon and the top-seeded Avs are done in the second round for a third season in a row. The latest chapter was a 4-2 series loss to Vegas after winning the opening two games — and following a first-round sweep of the St. Louis Blues.