ORANGE -- Mount Greylock registered the first major upset of the Western Massachusetts Division III volleyball tournament on Saturday night.
The 10th-seeded Mounties traveled to No. 6 Mahar Regional and came home with a five-set victory.
Greylock dropped the first set 18-25, but came back and won the match by scores of 25-23, 20-25, 25-22, 15-13.
The Mounties will travel to No. 3 Athol on Monday for a quartrfinal match.