[C]ompare a player's +/- to his team's +/- when he's off the ice. For example, let's say the New York Rangers score 3.87 goals per 60 minutes when Jaromir Jagr is on the ice, and allow 1.39, for an overall +/- of +2.48 goals per 60 minutes, which is very good. But when Jagr's off the ice, the Rangers +/- is -1.34. So Jagr's Behindthenet Rating - his +/- with respect to the rest of his team - is +3.82, an even better figure.I'm sure this stat will help free-agent-to-be Muir in negotiations this summer - after all, any list that has Travis Roche at the top is one you want to be high on (the list is actually very interesting if you throw out guys who haven't played in, say, half of their team's games).
H/t to BoO