I only gave up 9 points in my first 9 games and gave up 11 in the last one but that was kind of by design. I was up 15 to maybe 3 or something i don't remember but I had been kneeling the ball and was on 4th down from mid field with less than 20 seconds left. I took a run play and ran backwards to the 10 and went out of bounds. That's because on the 10 yard line my opponent couldn't get enough bonus points to beat me. He was smart and took a run play backwards himself past the 30 but that put him in a down and time disadvantage. He for some reason threw a pass play on the last play instead of running it which would have given him enough points. he caught the pass with 0 seconds left and i won.
Another trick is to let your opponent run back a kickoff if the score situation and time left will benefit you. The most he can get that way is 8 points and you most likely get the ball back.