Hockey transactions

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).

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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.