Canucks acquire Derek Roy:

Derek Roy isn't big in stature, but the Vancouver Canucks are counting on him to fill a gaping hole at center for the rest of the season. Struggling to score of late and with just two proven NHL centers on the roster most of the season, Vancouver acquired the 5-foot-8 Roy from the Dallas Stars on Tuesday in exchange for a second-round pick in the 2013 NHL Draft and prospect defenseman Kevin Connauton.

Roy, 29, has four goals and 18 assists in 30 games this season, and is scheduled to become an unrestricted free agent this summer. Roy spent his first eight seasons with the Buffalo Sabres, averaging almost 29 goals and more than 73 points at his peak as a top-line center from 2007-08 through 2009-10. His offensive numbers slipped as he battled injuries and slid down the depth chart, with 17 goals and 44 points in 80 games in Buffalo last season before being traded to Dallas for Steve Ott and Adam Pardy over the summer. Roy's expiring six-year contract has a $4-million salary cap hit, which the Canucks can absorb with David Booth on Long Term Injured Reserve and out the rest of the regular season after ankle surgery.

Booth is one of five injured Canucks forwards, a list that includes key centers Ryan Kesler and Manny Malhotra. Malhotra is done for the season -- and his career may be over -- after Vancouver management shut him down citing safety concerns over his limited vision. Kesler has only played seven games all season, missing the start recovering from offseason wrist and shoulder surgeries, and then breaking a bone in his foot shortly after his return in mid-February. A CT scan earlier this week reportedly showed the bone has healed, and Kesler, who won the 2011 Selke Trophy as the League's top defensive center, is expected to resume skating within a week. That could give the Canucks, who have used undersized rookie Jordan Schroeder and a variety of wings at center this season, a full lineup with Henrik Sedin, Kesler and Roy and Maxim Lapierre as their centers.

Roy also gives Vancouver another needed center for the second unit on a power play that has slipped to 29th in the NHL at just 12.8 percent. Kesler provides the net-front presence on the top unit.

Bruins acquire Jaromir Jagr:

After losing out on Jarome Iginla last week, the Boston Bruins have landed another veteran right wing bound for the Hall of Fame in a trade Tuesday. The Dallas Stars have traded 41-year-old Jaromir Jagr to the Bruins in exchange for a conditional second-round draft pick in 2013 and two prospects. The conditional second-round pick becomes a first-round selection in the 2013 NHL Draft if Boston advances to the Eastern Conference Final in this year's Stanley Cup Playoffs.

"Jaromir Jagr produced as a consistent scorer for our team all year and we would like to thank him for his contributions to our hockey club," Dallas Stars general manager Joe Nieuwendyk said. "With our eye to the future, we have acquired some valuable assets that we believe strengthen our organization." Bruins general manager Peter Chiarelli believed he had a deal in place to acquire Iginla from the Calgary Flames on Thursday, but the deal never happened and Iginla was sent to the Pittsburgh Penguins instead.

In 34 games this season, Jagr, 41, leads the Stars with 14 goals and 26 points. He has 679 goals and 1,000 assists in 1,380 career games. The prospects headed to Dallas are forwards Lane MacDermid and Cody Payne. MacDermid, 23, has played eight games with the Bruins over the past two seasons and has not registered a point. He has four goals, two assists and 82 penalty minutes in 37 games with Providence of the AHL. Payne, 19, was the Bruins' fifth-round pick in the 2012 NHL Draft. In 66 games with the Plymouth Whalers of the OHL, he had 24 goals and 45 points.