OwnersBox point system for the NHL is;
Offensive Stats
Goal (G) = 10 points
Assist (A) = 5 points
Shots on Goal (SOG) = 1 point
Blocked shots (B) = 1 point
Plus/Minus (+/-) = 2 points (the plus minus is a multiple of this)
i.e your player finishes with a -2 rating (-2x2 points) = -4 points
Goalies
Save (S) = 1 point
Goals Against (GA) = -5 points
Win (W) = 10 points
Shut Out (SO) = 5 points