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08-27-2012, 12:44 PM
Blue Blooded
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Statistics for defensive performance

There are a lot of Corsi-derived statistics out there, but I can't find any that measures the difference in Corsi of their opponents between their average and when they match up against the player in question.

Example: Daniel Sedin had a Corsi On of 21.09. Let's say that when he played against Rob Scuderi he only managed 13.09, this would give Scuderi a Corsi Opp of 8.00 vs Daniel Sedin. His total Corsi Opp would be the average of all the players he has been on the ice against weighted for icetime.

All the statistics required for calculating this is already being measured for use in Corsi and Qualcomp, why haven't this been put together before? I'd say it could be a good way of measuring a player's defensive performance. Of course it still doesn't account for playing style, but the guys that have bad Corsi Rel due to playing difficult minutes could be accurately measured in how good they are at containing the opposition.


This was something that just popped into my head last night, and after mulling it over and doing some calculations this morning I realized it was an incomplete measure of how a player affects the flow of play since the QoT wasn't accounted for.

A good measure would be the difference of expected Corsi and the Corsi of the player in question.

Expected Corsi would be: Corsi Qot - Corsi QoC. If your teammates have an average Corsi of -4 and the opposition an average Corsi of 2, the expected Corsi would be a -6.

If a player in that situation would have a Corsi of -2, it would be (-2) - (-6) = 4 point higher than expected, i.e. this player pushed the flow of play 4 points in the favour of his team when he was on the ice.

Corsi On - (Corsi QoT - Corsi QoC)

Last edited by Blue Blooded: 08-27-2012 at 11:38 PM.
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