I've got an easy explaination as to why they are in Nashville this Saturday:
While the rest of the country is still playing Baylor and San Diego State, the SEC is busy in it's "playoffs" time.
Seriously. OU has played Washington and a bunch of chumps, and has been damn impressive in those wins. But the games weren't competitive. No interest other than to OU fans. Not hatin' on OU, just sayin'.
Meanwhile, every week the SEC is eliminating potential championship caliber teams. The numbers don't lie.