Newspaper article The Canadian Press

Confused by Corsi? Puzzled by PDO? CP Explains Some of Hockey's Analytics Terms

Newspaper article The Canadian Press

Confused by Corsi? Puzzled by PDO? CP Explains Some of Hockey's Analytics Terms

Article excerpt

CP explains some of hockey's analytics terms

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Analytics are used by NHL teams to help assess players, plot tactics and prepare for opponents. With these advanced statistics becoming more mainstream among fans and media, The Canadian Press takes a look at some of the more common terms in today's hockey world.

CORSI

First developed by former Buffalo Sabres goalie coach Jim Corsi, this advanced statistic includes not only shots on goal, but also ones that were blocked by a defender or missed the net with teams playing 5-on-5. The statistic -- officially termed "even-strength shot differential" by the NHL -- has become a barometer for how much a team has the puck. If a player has a lower shot differential, in theory his team is more likely to be in the defensive zone when he's on the ice.

There is also tracking for even-strength shot differential when a team is trailing, tied, ahead or in a close game. A team that's winning might sit back more often, while one tied or ahead is more likely to press offensively. Calgary Flames defenceman Mark Giordano had an overall 57.63 shot differential percentage at even strength to lead the league last season, while the Carolina Hurricanes topped the NHL in even-strength shot differential at 54.45 per cent.

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FENWICK

Dubbed "unblocked shot attempts" by the NHL, this statistic is similar to Corsi except that, as the name suggests, it only includes shots that make it through to a goalie and miss the net -- not the ones that hit a player in front. Like Corsi, there are variable categories for when a team is tied, trailing, ahead or involved in a close game. The Boston Bruins led this category last season at 53.80 per cent, slightly edging out the Flames (53.32) and Hurricanes (53.17).

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PDO

This statistic adds together a team's shooting and save percentages at 5-on-5. The NHL terms this stat "shooting plus save percentage. …

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