https://www.youtube.com/watch?v=7XvIfm7Onmw SAN JOSE, CALIF. – In a dark, grungy practice rink on the outskirts of this Bay Area city, the Colorado Avalanche’s 2017-18 rookie class’s play, in the final analysis, mirrored their surroundings in their “Prospect Showcase” game against the youngsters of the San Jose Sharks Saturday night. Sometimes, promises of a bright future shone through. At other times, things…...