Rain has forced the cancellation of today's baseball doubleheader between Briar Cliff and Oklahoma Christian.  The doubleheader was scheduled to begin at 1 p.m., but recent rains have made the field unplayable.  The Chargers now hope to open  their 2010 schedule, tomorrow, at NAIA No. 3 Oklahoma City.  Instead of playing one nine-inning contest, the Chargers and Stars will now play two seven-inning games, beginning at 2 p.m..