The Dons opened the season on the road last week in frigid Marin County against perennial powerhouseMarin Catholic and nearby Tamalpais High School. The first game was last Tuesday at Marin Catholic.The temperature was in the 40’s with brisk 25 to 30 mile an hour winds. Yikes! The fans and playerswere freezing. Benji O’Rourke started on the mound for Acalanes.…