By Tony Catalina NEFJ CorrespondentGRAFTON — In a playoff matchup featuring two D4 powers with a Final Four appearance on the line, Grafton’s defense came to play en route to a 17-6 win. In what was a defensive struggle for most of the night, No. 6 Grafton was able to flex its defensive muscle on its way to a sound victory over No. 14 Marblehead. Grafton took the lead late...