RALEIGH, N.C. — The Penguins acquired center Derick Brassard from the Senators on Friday night in a three-team deal that sent defenseman Ian Cole to Ottawa and forward Ryan Reaves to the Golden Knights.The Penguins announced the deal Friday night during their 6-1 victory at Carolina, with general manager Jim Rutherford calling it "the most complex trade I've made" because of salary cap issues and the involvement of a third team.The Senators also received goalie prospect Filip Gustavsson and the Penguins' first-round draft pick this year and their third-round selection next year. Pittsburgh also acquired a pair of prospects — forward Vincent Dunn from Ottawa and forward Tobias Lindberg from Vegas — plus Ottawa's third-round pick this year.Vegas also received a fourth-round pick this year and is retaining 40 percent of Brassard's salary. Brassard is signed through next season with an average annual salary of $5 million, the Penguins said.Rutherford said that when he had been asked previously about acquiring Brassard, "the answer's always been no because we really didn't think we could figure out how to fit him under the cap."The 30-year-old Brassard had 18 goals and 20 assists in 58 games for the Senators this season. He has 159 goals and 261 assists in 702 regular-season games in 11 seasons with the Blue Jackets, Rangers and Senators.Pittsburgh is trying to become the first team since the 1982-83 Islanders to win three straight Stanley Cups. Brassard figures to slide in as the third-line center behind Sidney Crosby and Evgeni Malkin."We've tried to get more depth at center and get more insurance there," Rutherford said. "Our centers have played pretty well, but you've got to have a lot of strength at center, and we just felt we had a chance to get a guy like this, this was a good addition."The 29-year-old Cole had three goals and 10 assists in 47 games for Pittsburgh this season. He has played eight seasons with St. Louis and Pittsburgh, helping the Penguins win the past two Stanley Cup titles.The 31-year-old Reeves had four goals and four assists in 58 games this season for the Penguins and is one of the league's pre-eminent fighters. According to hockeyfights.com, Reaves has had 62 regular-season fights in his career with the Blues and Penguins. He has been in six fights this season.The 19-year-old Gustavsson plays for Lulea in the Swedish league.