Not so long ago that Girard was being hyped up as the best Avs dman and said to be worthy of being in the Norris discussion
He still is a phenomenal, Top ~30 Dman in the league. Would be the #1 on a number of teams tbh.
It just so happens that the Avs are one of the only teams in the league with too many top end Dmen(Particularly on the Left Side) and not enough minutes for all of them.
For my money Girard is still our best LD, one bad series against Vegas(Where he still wasn't even close to the worst D on the team or even his pairing for that matter) isn't changing that yet.
But, Byram is proving early on that he's going to be legit and could very, very soon pass Girard on the depth chart.
So it comes down to one of Girard or Toews likely needing to be traded to fill needs elsewhere. And I think the Avs look at Girard with his 5+ years still on his contract... He's the most valuable trade chip of the two and the needs we have(Quality 2nd line Center and Starting goalie) are expensive needs to fill. Hence Girard is possibly available.