Aside from sports:
South Park - C^ck Magic
This episode just took this season and made it legendary. The boys are more interested in Magic the gathering duels than watching girls sports (mainly volleyball) and find out about underground gambling involving roosters playing Magic. They train their own rooster and take him to "the big time" of underground c^ck magic dueling. Randy confuses his son's new found interest with, well, penis magic and "gets back in the game" from his college days. Hilarious all around, super episode, possibly in the top 10 SP episodes!
Randy's magic act at the kid's birthday party/10