There is still no confirmation on the terms of the trade, but earlier reports involved two first round picks and a second rounder for Kessel.
The Maple Leafs were reported to have interest in the restricted free agent all summer. An initial trade at this year's NHL Entry Draft which included Leafs' defenseman, Thomas Kaberle, fell through.
Kessel finished last season with a career high in goals (36) and assists (24) in 70 games for the Bruins.
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