Jan. 31—ORWELL — When rival schools play, anything can happen. The Grand Valley Mustangs upset the Pymatuning Valley Lakers 55-51 in a non-conference boys basketball game. GV (3-10) also broke PV's six-game winning streak. The Mustangs used an intense defense in the win. The Lakers (11-4) got off to a 16-12 first quarter lead and then went up 22-15 with five minutes to go in the second ...