Colborne always has been a bum. Avs got suckered in by him having a career year for Calgary. You don't buy high on players like Joe Colborne. There is a reason he can't stick with a team. His act grows old real fast.
The thing is, the Avs really aren't even using him and his best attribute. They did in the very first game, got him in front of the net and he got a hatty. Since then, I haven't seen them use him as a net front presence at all.