While PK% is the time honored NHL statistic, does it really provide the best measure of how well a team does in preventing power-play goals? I say not.
First and most obviously, the PK% statistic does not take short-handed goals into consideration. Clearly, if the penalty killers score a goal, that totally offsets what the opponent’s power play is trying to accomplish, not to mention the huge psychological boost it provides.
There are significant differences among NHL teams in short-handed goal scoring. In the first half of this season, nine teams have scored 5 or more times, while six have 1 or none. This performance spread clearly reflects on the quality of the penalty-killing units, but it's ignored in calculating the PK%.
Unfortunately, the PK% only considers how frequently the opponent fails to score on the power ...
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Article written by Jonathan Weiss