“Thank you, Kessel” is a popular refrain around Boston any time the B’s and Maple Leafs square off, and that won’t change as the two face off in the playoffs.

However, a more discerning fan will note that Boston and Toronto are linked by more than just the trade that sent Phil Kessel north in exchange for draft picks that turned into Tyler Seguin and Dougie Hamilton. Bruins general manager Peter Chiarelli has a long history with the Leafs franchise and has never been shy about pulling the trigger on a deal with the division rival.

Check out the video above to see why that might be.