Complex sentence: Some non-conference games attract no more than 10,000, with only 14-15,000 typically showing up for SEC games, including a few sell-out crowds annually for Kentucky, and the biennial game against Clemson.
Split into simpler sentences: Some non-conference games attract no more than 10,000, with only 14-15,000 typically showing up for SEC games. There have been a few sell-out crowds, Kentucky and the biennial game against Clemson.