Well, I've heard of Michael Vicks but don't get the joke.
Wait, I do know him. The guy who bet on the dog fights.

Still, believe it or not, I have a sports joke.

Ok, it was sent to to a lot of people at work. Now, keep in mind this is the West Coast so there is obvious bias here.
Four football fans; a Packers fan, a Giants fan, a Chargers
fan, and a Patriots fan are climbing a mountain and arguing about who loves his team more.
The Cheese Head insists he is the most loyal. 'This is
for the Pack!' he yells, and jumps off the side of the mountain.
Not to be outdone, the New York fan shouts, 'This is for the
Giants!' and throws himself off the mountain.
The San Diego fan is next to profess his love for his team.
He yells, 'This is for everyone!' and pushes the Patriot fan off the mountain.
Go Chargers!!

TIS