Flyers center Jeff Carter skated for about 10 minutes today and tried a few stops and starts before calling it a day. Sidelined with a sprained medial collateral ligament in his right knee since Game 4 of the Flyers’ first-round series against the Buffalo Sabres, Carter appears doubtful for Game 3 and 4 in Boston. … Goaltender Michael Leighton, sidelined since Game 6 against Buffalo with a back injury, practiced with netminders Sergei Bobrovsky and Johan Backlund.

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