The team did not disclose contract details.
Kobasew had career highs of 22 goals, 17 assists and 39 points in 73 games this past season. He finished second on the team in goals to Marco Sturm, who had 27.
Kobasew missed the playoffs with a fractured left leg. The Bruins were eliminated in the first round by the Montreal Canadiens in seven games. He was drafted with the 14th overall pick in 2001 by Calgary, which traded him to Boston on Feb. 10, 2007.