Movements in the world of hockey Tuesday:
National Hockey League
ATLANTA THRASHERS-Assigned LW Josh Gratton to Chicago (AHL).
BOSTON BRUINS-Signed F Milan Lucic to a three-year contract extension through the 2012-13 season.
DETROIT RED WINGS-Reassigned G Jordan Pearce to Toledo (ECHL).
MONTREAL CANADIENS-Signed D Marc-Andre Bergeron to a one-year contract. Announced F Sergei Kostitsyn has agreed to join Hamilton (AHL).
ST. LOUIS BLUES-Assigned C Derek Armstrong to Peoria (AHL).
American Hockey League
AHL-Suspended Portland D Joe DiPenta one game for his actions in an Oct. 3 game at Springfield.
WORCESTER SHARKS-Signed F Dennis McCauley to a one-year contract.