The Peterborough Lakers have taken a commanding 3 games to 1 lead over the Oakville Rock in the semi-final round of the MSL playoffs. The Lakers won game 4 at home last night by a score of 9-7. Close to 2400 fans were in attendance. Corey Vitarelli chalked up 4 goals and was named player of the game. Game 5 goes Friday night at the Peterborough Memorial Centre.