If the Colorado Avalanche are able to push the tempo the way they did in Game 1 — outshooting St. Louis 50-23 and outscoring them 4-1 — the Blues’ playoff days could be numbered. And if the Blues’ backs are against the boards, the West Division’s top seed knows what to expect after nine matchups this season and general, collective playoff experience. As Monday’s game ended, St. Louis’ Robert Bortuzzo’s helmet came off before he was pulled apart from Ryan Graves. Pierre-Edouard Bellemare lost his own lid as he tussled with the Blues’ Zach Sanford. Even Blues goaltender Jordan Binnington headed down the ice and pointed his stick at winning goaltender Philipp Grubauer as an official towed him away.