The Bruins have sent Vladimir Sobotka and Mikko Lehtonen back down to Providence. Lehtonen was sent down yesterday after making his NHL debut on Saturday against the Buffalo Sabres. Vladimir Sobotka was sent down this afternoon after practicing with the big club in Wilmington today. Sobotka played in 2 of the last 3 games after being recalled from the Providence Bruins. Sobotka has appeared in 25 games for the Boston Bruins this season, recording 5 points (1-4-5). The Providence Bruins are scheduled to open their first round series against the Portland Pirates in the Calder Cup playoffs tomorrow night at the Dunkin' Donuts Center in Providence, RI. Claude Julien has indicated that he plans to keep the Providence roster mostly in tact during the AHL Calder Cup playoffs unless emergency help is needed. Julien does not plan on calling up any "Black Aces" (minor league players called up to practice with the NHL team) until after the Baby-B's playoff run.