By Michael Najarian NEFJ Correspondent BILLERICA — Just over eight minutes into the first quarter of an MIAA Division 2 quarterfinal, Billerica had already jumped ahead three scores, leading Peabody 19-0. According to head coach Shawn Theriault, that was exactly how they planned it. “We just jump teams,” said Theriault. “[It puts] a lot of pressure on them, it gives us a lot of momentum, and that’s how we’ve been...