Last year, the Boston Bruins got Tyler Bertuzzi from the Detroit Red Wings. He was great in the playoffs, scoring a lot.
This summer, Bertuzzi went to the Toronto Maple Leafs. At first, he didn't do so well, but then he got better and helped his new team a lot. Now, Bertuzzi's old team, the Bruins, will play against his new team, the Leafs, in the playoffs.
Another player, James van Riemsdyk, used to play for the Leafs but now plays for the Bruins. He adds more excitement to the game because he knows both teams well.