Every week there seems to be one of these questions (my GF wants me to meet her family; I have to work, what should I do, etc etc...)
Dilemmas Dilemmas. The answer is easy. For girls, dump em. No chick that doesn't understand how important the jets or ravens game is worth keeping around.
For work, if it's a job you could get somewhere else (like, say, retail), then it's a no-brainer. Leave.
If it's a job you like and they like you, then compromise. Don't lie (err, at least not totally). If every one knows you're a big phin fan, it does you no good to say 'you're sick.' Say something like, I have family from out of town coming to watch the game. I HAVE to be home. My wife, mom, whatever will kill me if I leave her alone with them, etc.. Offer to work from 9-12:30 and work late another night. Like I said, if it's a good place that wants you around, most bosses would do this.
I'm married with two kids (and in my younger days worked on some sundays) and I've managed to navigate my way into watching every fins game since Sunday ticket was invented (hurricane-related issues not withstanding)!
Good luck