The news out of Avalanche practice Thursday: Ryan Wilson has a back injury and highly doubtful for Friday’s game with the Flames. He’ll be seen by Dr. Parker this afternoon and we might know more then. It’s just the latest in a string of injuries that have felled Wilson the last couple years. Matt Duchene didn’t practice today because of a bruised foot, the result of blocking a shot last night against the Predators. The good news is Patrick Roy believes Duchene will play tomorrow. The other news is that rookie Nathan MacKinnon is moving back to center on the third line. He will skate with John Mitchell and Max Talbot, and Jamie McGinn will move to right wing with Paul Stastny and Gabe Landeskog. Roy said it became clear to him that MacKinnon needs to be at center to better utilize his speed and passing ability. I thought he did some good things as a winger, but the fact is he had no points and no shots in a 6-4 game last night – though his line was even in a 6-4 game too, plus-minus wise. I definitely believe that MacKinnon is better utilized at center, and on a third line. That gives the Avs three lines in which at least one guy can make a game-breaking type of play. Not that the other guys can’t sometimes, but I really thought that last night the Avs had next to nothing offensively when it was time to roll out the third and fourth lines, and that made it easier to shut them down in the end.