There's a sociological genius at work in the Oakland Athletics marketing department. The current slogan for the franchise, "green collar baseball," speaks volumes about the culture of the bay area, and why I have become such a devoted fan of the Oakland A's.

Thank goodness baseball is back and opening day for the Athletics is just around the corner.

Across the Bay Bridge, you'll find a better stadium (AT&T Park), a team with a higher payroll, fancier concessions, and fancier fans. You'll find doctors, lawyers, and San Francisco techie types taking in an afternoon game, reveling in the see and be seen crowd. On the San Francisco side, baseball is very much en vogue. If you search hard enough, you might even find a fan in the crowd who can tell you what a change-up is or explain the infield fly rule.