Jerry Mungo is the star runningback at Pennbrook, and widely rumored to be dumber than Eric. When it looked like he wouldn't be able to qualify for a big game against the Amish, who they haven't beaten in 47 years, Rachel tried to tutor him. However, he proved too stupid to understand her.
Jack and Eric tried to take advantage of his certain failure by betting a large sum of money on Amish to win. To make sure Feeny would not go easy on him at all, Eric pretended to antagonize him about caring more about education than about football. However, Eric was so gleeful about tricking Feeny that he overdid it, causing Feeny to personally tutor Mungo until he got a passing grade. Jack and Eric went into hiding as a result.