So everyone's all abuzz this morning about Tom Verducci's Sports Illustrated cover story this week, a look the complex organism that is the brain of Alex Rodriguez. We think Verducci is one of the best guys SI has, and the story's well-written enough, we guess, but we don't quite understand what the big deal is. A-Rod is kind of a weirdo, his teammates aren't sure whether they like him or not, he and Derek Jeter aren't the best of pals, so on. As much fun as it is to see Rodriguez revealed to the world as the basket case we've know he was all along, we just didn't find that much new in the story. Well, two things, actually. First: When did Jason Giambi all of a sudden become some clubhouse leader? He's quoted throughout the story like some so…