sports & games

How come sports games always ruin regular programming on television ? The past two nights in a row there has been a football game on during Seinfeld, Two and a half men, and The Simpsons time slot. And its grinding my gears. To make it worst its not even listed on my local t.v guide. I had chips and a glass of coke ready, turned on fox. No Seinfeld, just a football game. Whats the point of airing sports games randomly every 2 months or so. People with satellite can see it regularly.