NHL trade grades: Report cards for Peterka to Mammoth

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Two of the storylines to watch this NHL offseason were whether the Utah Mammoth could add at least one top-six forward to their roster, and if the Buffalo Sabres would part ways with restricted free agent J.J. Peterka.

Wednesday night or early Thursday, depending upon the time zone, those narratives collided, with the Mammoth acquiring Peterka in a trade with the Sabres, with forward Josh Doan and defenseman Michael Kesselring going to Western New York.

Let's look at how both front offices performed in this swap, as well as what it means for each franchise moving forward.

Utah Mammoth

Grade: A+

In 2024-25, the Utah Hockey Club was a top-10 team in terms of shot share, shots…