Coach Ken Hitchcock and general manager Doug Armstrong said after the Blues were eliminated in the first round of the playoffs that they did not anticipate widespread changes but that they expected more from their top players.
The 24-year-old Shattenkirk was among the scoring leaders by a defenceman with 23 points. Since entering the NHL in 2010, he's fourth among American-born defencemen with 109 points.
The 25-year-old Berglund was second on the team with 17 goals and tied for fourth with 25 points. He leads the Blues with 36 goals the last two seasons.
I'm very excited about what happened today. We've worked on this deal with Toronto for a month, or over a month. It got a little bit of legs on draft day, but it really heated up last night, and we were able to complete the deal today.
— Penguins GM Jim Rutherford on Phil Kessel, who he acquired from the Maple Leafs in a trade on Wednesday