Complex sentence: Oglethorpe's first large game against another college that was widely viewed by the public was played against The University of Tennessee at Chattanooga, although Oglethorpe did play Auburn University earlier that season.
Split into simpler sentences: Oglethorpe's first large game against another college that was widely viewed by the public was played against The University of Tennessee at Chattanooga. Although it should be noted that Oglethorpe did play Auburn University earlier that season.