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Outside of the defending champs, the underdogs are ruling the first round<p>After a historic night in which four NHL playoff games churned out four different overtime matchups for the first time since 1985, the first round of the postseason swung even more in favor of the underdogs.<p>The Pittsburgh …

Read more at CBS Sports: http://www.cbssports.com/nhl/news/nhl-playoffs-maple-leafs-and-predators-trending-up-as-conference-favorites-tumble/