GUARDING THE SIOUX VALLEY BALL HANDLERMcCook Central/Montrose’s Mason Sabers (right) and Owen Alley (center) look to defend the Sioux Valley ball handler in last week Thursday’s Big East game in Salem. (Photo/Troy Schwans) Troy Schwans | Managing Editor The McCook Central/Montrose boys hosted two Big East Conference teams last week, Baltic in Montrose and Sioux…