Dallas Stars center Steve Ott (29) celebrates after scoring a goal against the San Jose Sharks as defenseman Dan Boyle (22) looks down during the second period of an NHL hockey game in San Jose, Calif., Thursday, Feb. 2, 2012. The Buffalo Sabres have acquired forward Ott and defenceman Adam Pardy from the Dallas Stars in exchange for forward Derek Roy.Sabres general manager Darcy Regier announced the trade Monday. THE CANADIAN PRESS/AP-Tony Avelar