Fenwick is an advanced statistic used in the National Hockey League to measure shot attempt differential while playing at even strength.
On November 22, 2007, he wrote a blog post in which he explained his argument that the best use of Corsi was to derive objective figures that could be used to predict scoring chances, and that a blocked shot is either not a true scoring chance or an average that is of worse quality than unblocked shots.
Since then, it has evolved into an advanced statistic that is often used to analyze scoring chances alongside Corsi.
On a team level, Fenwick is considered to be one of the best ways of predicting future success because it may be a better indicator of quality shot chances than Corsi as a result of its exclusion of blocked shots, which is considered a skill that defensive players use to prevent scoring chances.
These subcategories are useful in coaching for determining which players should be sent out on the ice depending on the current score of the game.