Snow-Guzman’s game-winner sinks St. Mary’s

LYNN — The St. Mary’s and St. John’s Prep boys basketball teams never waver from playing top-notch opponents. Thus, it was only fitting that the Spartans and Eagles clashed against one another Monday night at Conigliaro Gymnasium. Eagles sophomore guard Jarnel Snow-Guzman, a Lynn native, saved his best for last, scoring 14 of his 18…