One of the great agitators in NHL history, Lemieux also is one of eight players in league annals to win Stanley Cup championships with three different teams. He captured his first with Montreal in 1986, added two with New Jersey (1995, 2000) and another with Colorado in 1996.
Lemieux, 37, was one of the first players acquired by Phoenix after Wayne Gretzky became a part-owner of the team. The only Coyote to play all 82 games in 2001-02, he was tied for eighth on the team in scoring this season with six goals and eight assists in 36 contests.
"Claude adds experience, depth and versatility to our forward group," Stars General Manager Doug Armstrong said. "He is a proven winner who has a postseason resume that speaks for itself. We feel he will make an immediate impact for our organization."
With Dallas sitting atop the Western Conference with 61 points, Lemieux has a chance to join Jack Marshall as the only players to win a Stanley Cup with four different teams.
Lemieux won the Conn Smythe Trophy in 1995 as most valuable player of the postseason. He ranks third all-time with 80 playoff goals, 19 game-winners and 519 penalty minutes.
Pellerin, 33, is a checking specialist who has a goal and three assists in 20 games this season, his 10th in the NHL and second with the Stars.
The 1992 Hobey Baker Award winner as college hockey's top player, Pellerin also has played for New Jersey, St. Louis, Minnesota, Carolina and Boston.