Jim Corsi: The man behind Corsi numbers

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The hockey world is ages behind “Moneyball” philosophy and Sabermetrics, just to name a few buzzwords associated with the innovative stats championed by baseball writers and stats gurus for years. That isn’t to say that hockey bloggers/writers/fans/front office people are completely turning a blind eye to analysis that goes deeper than goals, assists and plus/minuses, though.

One of the most well-known “new” stats is the Corsi Number, named after Buffalo Sabres goalie coach Jim Corsi (he’s the guy in that photo who’s either short … or maybe standing next to Tyler Myers). To explain the stat (a bit too) simply: it’s basically an alternative to plus/minus in which shots replace goals. Here’s a more detailed description from David Staples’ great story about Corsi (the man and the stat).

Corsi is a plus/minus stat that measures shots directed at net. For example, if the Edmonton Oilers direct 30 shots at even strength at the Calgary Flames’ net in a game, while the Flames direct 45 shots at the Oilers’ net, the Oilers have a Corsi of -15 for the game. People who put a lot of faith in Corsi plus/minus numbers argue that you even if a team loses a stretch of games, but if that team has a strong Corsi plus/minus in each game, it’s an indication that the team really isn’t so bad, that it’s moving the puck to the right end of the ice, that it has territorial dominance, and that the goals will soon come.

This team Corsi number is also broken down and applied to individual players. For example, if Sheldon Souray is out on the ice for 10 shots directed at the Flames’ net, while the Flames direct 15 shots at the Oilers’ net while Souray is on the ice, he’s said to have a Corsi plus/minus of -5.

It’s a fascinating story that is definitely worth the read. I’ll leave you with the stat’s origin story, from Corsi himself.

The traditional way of measuring a goalie’s work load was to look at the number of shots against the goalie faced in a game. But having played goalie himself, Corsi didn’t trust that basic indicator so much. “When I played, I’d finish a game with about 25 shots on goal and I was really tired. I was really very, very tired,” he says.

“When you look at 20 or 25 shots, you say, Well, it’s a light game.’ But if you look at a game, an (attacker) comes down the right side, he’s got the puck, and he turns up the boards, towards the wall, the goalie is not standing on his heels going, ‘Oh, you know, whatever.’ He’s going to bear down, tense up, prepare that this is going to end up as a shot. Now as (the attacker) turns, he (the goalie) has still got to be engaged and wait for the next play.

“You get a 25-shot game, but with all the blocked shots and the increase in blocked shots and the tightness of the defensive zone coverage, the activity of the goalie could almost be like 75 to 100 actions at the net.”

To get a better sense of how much work his goalies faced, Corsi started to use the NHL’s data that tracks missed shots, blocked shots and shots on goal. He added all these together to come up with a goalie’s so-called Corsi number for a night of work. “It’s really just a number that I’ve used for goaltenders to hone in on their fitness and how much activity is actually going on with respect to goaltending.”

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    ‘It’s getting stronger every day’: Bishop says he’ll be ready for World Cup camp

    2015 NHL Stanley Cup Final - Game Three
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    With the World Cup of Hockey approaching, Ben Bishop seems optimistic he’ll be ready to participate in the Team USA training camp prior to the event.

    Bishop, the Tampa Bay Lightning goalie, was injured on a seemingly innocent play and had to be stretchered off the ice in the first period of Game 1 of the Eastern Conference Final.

    There had been talk that he could perhaps return to game action, but in the end, he didn’t play another game in the series, as the Bolts were eliminated by the Pittsburgh Penguins in seven games.

    “The leg is feeling better and it’s getting stronger every day,” Bishop told ESPN.

    “I’m getting ready to start skating soon … and get back on the ice and doing that side of things. We have about a month until we go, so I’ll start off slow and pick it up in the next month and be ready for training camp for the World Cup.”

    Good news for Team USA, which also called on Jonathan Quick and Cory Schneider for their goaltending duties. The tournament begins Sept. 17.

    In keeping with the optimistic mood about his status for the World Cup, Bishop last week revealed his new Team USA mask.

    Related: Lightning lock up Vasilevskiy — what now for Bishop? 

    Benn aims to be ready for World Cup after offseason surgery

    Fans celebrate along with Dallas Stars left wing Jamie Benn (14) after a score by Benn in the first period of Game 3 of a first-round NHL hockey Stanley Cup playoff series game, Monday, April 21, 2014, in Dallas. (AP Photo/Tony Gutierrez)
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    Surgery earlier this month to repair a core muscle has put Jamie Benn‘s status for the upcoming World Cup of Hockey in question, however the Dallas Stars captain still aims to be ready to play for Team Canada.

    It was announced on July 15 that the recovery timeline for this surgery was six weeks, which certainly makes it possible that Benn could be ready for the tournament, which begins Sept. 17.

    “As of right now, yeah. I think this is a surgery that I’m able to come back a little quicker than double-hip surgery. That’s the main focus I’m training towards being able to make it for World Cup. We’ll just see what happens,” said Benn, as per Mark Stepneski of the Stars’ website on Saturday.

    “Well, I think I’ll get on the ice later this week and just keep ramping it up a little more each time. I still think that’s a lot of time, enough time for me to be ready to jump into high-level hockey.”

    Benn had 41 goals and 89 points last season with the Stars. He signed an eight-year, $76 million contract extension on the same day his recent surgery was announced.

    Benn’s teammate Tyler Seguin “should be ready for the World Cup,” said Stars GM Jim Nill earlier this month.

    Done deal: Coyotes sign 2016 first-round pick Chychrun to entry-level contract

    BUFFALO, NY - JUNE 24:  Jakob Chychrun poses for a portrait after being selected 16th overall by the Arizona Coyotes  in round one during the 2016 NHL Draft on June 24, 2016 in Buffalo, New York.  (Photo by Jeffrey T. Barnes/Getty Images)
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    The Arizona Coyotes moved up the draft order to select defenseman Jakob Chychrun at 16th overall. And now, they have signed Chychrun to a three-year entry-level contract.

    The Coyotes made the announcement on Saturday.

    “We are very pleased to sign Jakob to an entry-level contract,” said Coyotes GM John Chayka in a statement. “Jakob is a highly-skilled player with an all-around game. He has a great work ethic and is very determined. We look forward to watching him continue to develop this season.”

    When the 2015-16 season began, it was suggested Chychrun could potentially be a top-three pick in the draft in June. But he fell down the order, despite being the No. 4-ranked North American skater by NHL Central Scouting.

    He was the fifth defenseman taken in the draft.

    Listed at six-foot-two-inches tall and 215 pounds, Chychrun brings size and strong skating ability to the blue line. He had 11 goals and 49 points last season with Sarnia in the Ontario Hockey League.

    The Coyotes selected Chychrun after acquiring the remainder of Pavel Datsyuk’s contract from the Detroit Red Wings and moving up the order.

    Chychrun’s fall — and what precipitated it in the first place — was discussed in great detail when the Coyotes held their development camp earlier this month.

    “I think it was about being tense,” said Coyotes director of player development Steve Sullivan. “All the pressure of wanting to be second overall and maybe not having a great season; it snowballed the wrong way for him.

    “Now he needs to understand he’s been drafted into the National Hockey League and we’re going to put him in a game plan to get him here as fast as we can. He can loosen up and play the way we think he can play. If that happens, there is no reason why he won’t be here sooner than later.”

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    Report: NHL linesman Henderson required neck surgery, friends fear his career may be over

    Nashville Predators' players look over the bench at linesman Don Henderson after he was hit by Calgary Flames' Dennis Wideman during second period NHL hockey action in Calgary, Alberta, Wednesday, Jan. 27, 2016. (Jeff McIntosh/The Canadian Press via AP)
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    Don Henderson, the NHL linesman knocked to the ice by Calgary Flames defenseman Dennis Wideman, has undergone neck surgery to repair damage from the hit and there are fears his career may now be over, according to a report in the Boston Globe.

    From Kevin Paul Dupont of the Boston Globe:

    According to one of his friends in the officiating business, Henderson’s recent surgery was aimed at repairing two ruptured disks in his neck, the result of the hit. Felled in the second period, he dusted himself off and finished the game the night he was injured.

    “I know a lot of people are saying stuff like, ‘Hey, Wideman’s not that type of guy . . . that’s not in his nature . . . he’s a good kid,’ ’’ said one of Henderson’s longtime pals in stripes. “And I say, ‘Yeah, so what?!’ That doesn’t make it any less egregious. He attacked him from behind, the puck was nowhere near the two of them, and now Henderson’s career may be finished. I don’t see much difference between what he did and Wayne Maki cracking his stick over Teddy Green’s head.’’

    This is the latest development in a saga that has dominated headlines in the NHL since the incident occurred late in January.

    Wideman apologized following the incident, saying the collision was ‘completely unintentional.’ The league later confirmed that Wideman had suffered a concussion from a hit just seconds before he checked Henderson to the ice near the bench.

    He eventually received a 20-game suspension, but that was reduced to 10 games by a neutral arbitrator, although Wideman had already sat out 19 games when the decision was handed down following an appeal.

    Related:

    Report: NHL dismisses neutral arbitrator who reduced Wideman’s suspension

    NHL sues NHLPA to reverse Wideman’s suspension reduction

    NHL Officials’ Association ‘strongly disagrees’ with the decision to reduce Wideman’s suspension