GREELEY, Colo. — The postseason is full of ups and downs that can change rapidly. After pulling the upset of the defending Big Sky Champions last night, Eastern Washington volleyball bowed out of the Big Sky Tournament tonight against Montana State. The Bobcats defeated the Eagles, 3-1, ending EWU’s season. Sage Brustad closed out her Eastern career in style, going for 22 kills and 12 digs, with a .347 hitting percentage. Bri Gunderson had 11 kills with a .333 percentage. “I’m really proud of our team all season. Going into the tournament, we asked them to come out and compete.…