by PuckStopsHere on 07/28/09 at 07:18 AM ET
This summer in my look at sabermetrics and hockey, I have been looking at the Corsi Number. They are much like +/- ratings, except since they include all shots directed at the goal (including missed shots and blocked shots) they give much larger numbers with less random fluctuations in them, They show who is driving puck possession (those players with good Corsis) and remove the element of goaltending from +/-. When players play defensive roles that do not drive puck possession, their Corsi is not always a good method of rating their play (with the best example of this being Jan Hejda). Thus far, I have only looked at Corsi Numbers treated as counting numbers and not as rates (per minute). This is how they are treated at behind the net.
Here are the top twenty players (with 50 games played or more last year) ranked by Corsi per minute of 5 on 5 play:
Clearly there is a need to adjust these ratings to account for team effects. The top 18 players on this list come from only three teams - Calgary, Detroit and Washington. These are the top three teams when ranked by team Corsi Numbers. It is team effects that get most of the players onto this list.
We see that many of the same players who appear on the top 20 counting number list also appear here. That is not a surprise. However, there are a significant number of players who had good Corsi rates but did not have enough ice time to get onto the counting number list. That is most clear at the top of this list where Sergei Fedorov and Eric Fehr both appear. Neither made the top 20 counting number list. This list can be adjusted in a similar manner to the way +/- ratings are calculated on/off ice.
This is a list of the top Corsi rates is a list of players on good teams who had good puck possession. We will see in the future how much the team element can be removed to better measure individual players.
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