The Thrashers signed unrestricted free-agent goaltender Chris Mason to a two-year deal on Thursday.
The deal is worth $1.6 million next season and $2.1 million in 2011-12.
Mason, 34, appeared in 61 games last season for St. Louis. He went 30-22-8 with a 2.53 goals-against average and a .917 save percentage.
“Chris has proven himself as an elite-level goaltender and we have the utmost confidence in his capabilities,” Thrashers general manager Rick Dudley said in a statement released by the team. “We are pleased to add him to our organization are excited to follow his lead into the playoffs.”
The 6-0, 200-pound goaltender earned five-straight victories from Feb. 9 to March 4, posting one shutout, a 1.74 goals-against average and a .949 save percentage during that stretch.
Mason was originally selected by New Jersey Devils in the fifth round (No. 122 overall) in 1995.
The Thrashers also acquired winger Andrew Ladd, a first-round pick (No. 4 overall) in 2004, from Chicago for defenseman prospect Ivan Vishnevskiy, obtained from Dallas in the Kari Lehtonen trade, and a second-round pick in 2011.
Ladd, 6-foot-2, 200 pounds, had 38 points (17 goals, 21 assists) and was a plus-2 in 82 games for Chicago last season. In 19 playoff games, he had six points (three goals, three assists) and was a plus-4.
In six NHL seasons, three with Carolina and three with Chicago, Ladd, 24, has scored 149 points (63 goals, 86 assists).