In the 21st century, most baseball fans know what WAR and OPS stand for. Basketball fans are getting to know PER, and football fans keep track of QBR. Among the major American sports, hockey is the final frontier for the statistical-analysis movement, but two buzzwords this season are making inroads to the analytics glossary: Corsi and Fenwick.

They are the surnames of an NHL goaltending coach and a hockey blogger from Alberta, Canada, respectively, and they are rapidly gaining traction in the way hockey players are evaluated....