Edited Oct. 12, 2022 at 5:40 p.m.
Quoting: mokumboi
See, the thing is, xG never won a game. The Blues play to push things wide, and a not insignificant portion of their xGA comes from teams taking a lot of shots from out wide. I'm not saying they can't tidy up on allowing chances, but there is some context for these poor xGA numbers. And analytics often require context.
So you're saying that the reason there's a discrepancy between the Blues' xG and GA is that they were actually so good at protecting the middle that opponents got the vast majority of their shots from around the point and the boards. But if a team allowed mostly only those kinds of shots, their xG results would look super great. That's the definition of an expected goals model, probability of shots becoming goals based on where the shot happened. If you are saying the Blues are pushing things wide and are actually good at that, but then also acknowledging that they looked bad in xG (and I don't know what model specifically
@STLBlues17 is using, I'm looking at Evolving-Hockey where they are 21st in xGA/60), then one of two things is true.
1. The Blues allowed a crazy number of shots, so many more shots that these tiny probabilities for outside chances can outweigh teams that allow a few high danger shots in front of the net. Point shots are commonly worth as little as 0.02 xGs, where rebound chances in front of the net can be worth as much as 0.4 xGs, so this would mean that a conservative estimate is that the Blues would have to allow 15 more shots from the outside to get the same xGA number as a team that allows one high danger rebound chances. This is obviously not true, the Blues were middle-of-the-pack almost exactly in shots allowed last year at 17th and near bottom of the pack in shots blocked at 27th. This is not a team that was allowing tons and tons of shots and keeping them to the outside or blocking them. Allowing the amount of shots you're saying would "add up" to look that bad via the model is basically impossible. The Blues had worse xG numbers than the Ducks, Sharks, Oilers, Sabres and Blackhawks. Things add up, but not that much.
2. The Blues might THINK they are or WANT to be good at protecting the middle (it's a decent defensive philosophy) but last year they simply were not. And this is
the truth.. I agree with STLBLues17 that they were better in the playoffs and I agree with you that a lot of their problems were giveaway based.
I'm not trying to make a judgement call on this year's group or say they can't be better, but it's pretty obvious that last year their defense protected right in front of the net and the edges while allowing a lot of medium and higher danger shots from the middle (leading to their bad xG numbers) and their goalies (mostly Husso) bailed them out. Analytics requires context and there's a lot of it to give when you talk about how xG rated the Blues OFFENSE last year but there's not really a lot to figure out why the stats were the way they were on defense.