Begin was traded midseason from Montreal to the Dallas Stars for Doug Janik. He had two goals in 20 games for Dallas, and six during the 2008-09 season. Begin finished off that season with 13 points.
Begin was originally drafted by the Calgary Flames out of Trois-Rivieres, Quebec. He was eventually traded to the Buffalo Sabres with Chris Drury for Rhett Warrener and Steven Reinprecht in July 2003. After the Sabres released him he was claimed off waivers by Montreal in November 2003.
Begin's best season was in 2005-06, when he finished with 23 points. He scored 11 goals and had 12 assists.
If Mark Recchi stays with Boston, I think that this move is kind of useless for the Bruins. If Recchi retires or is traded (which I doubt), Begin will be a waste of roster and cap space.