When I am deciding who to pick in my underdog pools I just go by simple averages on these things. It's not the most scientific way of doing things but as the season progresses I think the averages tend to become the rule rather than the exception. This is particularly true IMO in cases where you have two teams such as UTK and UGA that are not particularly noted for being outstanding on a particular side of the ball.
UGA is averaging 32.6 ppg and the Vols are giving up an average of 37.5 ppg. Split the difference and UGA should expect to score 35 points on the Vols.
Meanwhile, the Vols are averaging 34.5 ppg while the Dawgs give up an average of 17.2. Split the difference and UTK should expect to score 26 points on UGA. If you want a cherry on top you can spot the Vols a field goal for home field advantage but that still puts them about a TD away using my admittedly unscientific approach to prognostication.