Umberger was let go by the Stars on Wednesday from his professional tryout agreement.
Umberger will join the Stars at training camp after agreeing to terms on a professional tryout agreement Friday, Aaron Portzline of The Columbus Dispatch reports.
Umberger, as expected, was bought out by the Flyers and is now on the free agent market.
Umberger will be the subject of a contract buyout by the Flyers, Dave Isaac of the Courier-Post reports.
Umberger tallied two assists Tuesday in a 6-3 win over New Jersey.
Umberger finally notched his first goal of the season Thursday, opening the scoring in a 5-1 victory over the Sabres.
Umberger will be a healthy scratch Tuesday night against the Canadiens, Sam Carchidi of the Philadelphia Inquirer reports.
Umberger has just one point in the eleven games since his return from a foot injury in early December.
Umberger (foot) has fully recovered from his foot injury, Tim Panaccio of CSN Philadelphia reports.
Umberger (lower body) skated on a "fifth" line with Ryan White and Vincent Lecavalier during Monday's practice, Bill Meltzer of NHL.com reports.