To that point, the team right now is a collective -71. The year before, they were a plus 20. The year before that they were a plus 62. Before that, plus 392, plus 111, and plus 286.
Did you get those numbers by adding up every player's plus/minus? Because if that's what this is, then it's pretty flawed.
But if you're in to plus/minus, the Bruins have scored 84 Even Strength goals this year, and they've allowed 100. They've scored 6 Shorthanded goals, and they've allowed 5. As a team, they're -15.
So what's the real outlier here? A slight dip in shooting percentages or a huge decline in plus minus by the entire team?
1. It's not a slight dip.
2. You're looking at a symptom and trying to convince me it's the cause.
3. If your plus/minus is going down, it's because you're allowing more goals, scoring fewer goals, or both. I don't know how you can look at plus/minus by itself, and diagnose the defense as the issue.
2015-16: 2.40 GF/60 (6th), 2.29 GA/60 (21st)
2016-17: 1.98 GF/60 (23rd), 2.36 GA/60 (20th)
They're basically the same defensive team as they were last year. (You could make a case that they're better defensively...) They're much worse offensively. Last year, they were a middle-of-the-pack team when it came to Even Strength Shooting Percentage, and this year, they're nearly historically bad.
Fact is this team is terrible defensively to the point where forwards are being forced to do more on the defensive side, just to try and cover up those glaring holes, and the scoring has declided greatly because of it, IMO.
So, the forwards are so focused on playing defense that they're leading the league in shots? And the historical shot charts don't suggest that the shots they're taking are lower quality.
Patrice Bergeron in 2015-16 when he shot 11.3%:
Patrice Bergeron in 2016-17 when he's shooting 6.3%:
I'm not buying it. I think you have a theory as to what's wrong with the Bruins, and you're using statistics (...often incorrectly) to try and back it up. That's how you get bad statistical analysis.