By STEPHEN MARTELLUCCI
LYNNFIELD — In a rare Sunday afternoon game, the Lynnfield High boys’ basketball team nipped guest Stoneham, 49-48, as Alex Fleming hit a game-winning 3-pointer from just beyond the top of the key at the buzzer to set off a huge celebration.
With that non-league victory, the Pioneers improved to 10-6 as they officially punched…