This was the ninth-ranked Tennessee from the Southeastern Conference. It played before more than 100,000 fans at the historic Neyland Stadium. Appalachian State of Sun Belt Conference was paid $1.15million to be the opening game sacrificial Lamb. Appy nearly did it again nine years after Appy State Mountaineers defeated Michigan in one the most storied upsets in college football. The Mountaineers could have defeated a team that most experts believe will win the SEC Eastern Division. Although Tennessee won overtime 20-13, Appy State reminded everyone of three important college football truths: The same goes for Thursday. We have three days more of incredible football this weekend in college football…