New Jersey general manager Lou Lamiorello announced the deal on the team's official website. While no terms were disclosed, reports indicate it is a one-year pact. He's coming off a one-year, $4.5-million US deal.
The signing is likely good news for a squad that lost the likes of second-leading scorer from last year Ilya Kovalchuk to retirement and witnessed the departure of gritty forward David Clarkson via free agency to the Toronto Maple Leafs.
The Devils missed the playoffs last year and were 28th in goals for in what was a disappointing follow-up campaign to 2011-12, when they lost the Stanley Cup final to the Los Angeles Kings.
Jagr, 41, split last season between the Boston Bruins after being shipped over from the Dallas Stars. The five-time Art Ross Trophy winner scored 16 goals and 35 points in 45 games last campaign. He struggled to find his groove in the post-season, going goalless with 10 assists in 22 playoff games en route to the Stanley Cup final.
Originally selected fifth overall in the first round of the 1990 NHL Entry Draft, the Kladno, Czech Republic native has 681 goals and 1,688 points in 1,391 career regular-season games with the Pittsburgh Penguins, Washington Capitals, New York Rangers, Philadelphia Flyers, Stars and Bruins.
He'll join other forwards acquired via free agency Michael Ryder, Rostislav Olesz, and Ryane Clowe.