There really are two HFAs at play....
1) there is13% less O2 in the air at LES than in Troy Alabama. Going from near sea level to nearly 5,000 ft makes that big a difference in O2 content. Look it up.
2) the game starts at 7:00 pm local time. But that is 9:00 pm in Troy, Alabama. Starting a game on your night-time biorythms is not easy. Ask every MWC player that ever traveled to Hawaii for a 7:00 pm HAST game. It's a huge advantage.