NESN's Naoko Funayama is reporting that the Bruins have traded center Vladimir Sobotka to the Blues for the rights to Boston University defenseman David Warsofsky.

Sobotka recorded 10 points (four goals, six assists) in 61 games this past season for the Bruins.

Warsofsky, who was drafted by St. Louis in the 2008 draft, scored 12 goals and added 11 assists for Boston University in the 2009-10 season.