Wednesday, October 23, 2013

Martin Biron Retires

The USA Today reports that Martin Biron has retired from the NHL.  So I thought that I would take a look back at his NHL career using our NHL goalie performance measure called Wins Above Average (WAA).  Here is Martin Biron's goals against average (GAA) and his WAA over his career.


Notice that in terms of GAA, his numbers are fairly similar, but in terms of WAA his numbers move around much more.  The Pearson correlation between GAA and WAA is -0.323, indicating that GAA and WAA weakly move in opposite directions.  One of the concepts that we are interested in is how do NHL goalies perform from year-to-year, or how consistent are NHL goalies. Earlier this month I reported that NHL goalies remain "consistent" only about 25% of the time covering the 1997-98 to 2012-13 NHL regular seasons.  To help with that, here is where Martin Biron ranked each season in terms of Wins Above Average (remember that lower numbers are higher or better ranking).

As you can tell from the graph above, Biron was rather inconsistent in terms of his overall WAA, especially over the end of his career.

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