Barry Zito took the mound for his first spring training startMonday and walked the ballpark. It wasn't exactly what the Giants had in mind, and here's amessage to all those fans who have seen enough of Zito: He'swalking a very fine line within the organization. A source close to the team indicated Tuesday that there is"exasperation" with Zito, that his status as the No. 5 starter is"definitely not safe," and that the team would even consider buyingout his expensive contract before Opening Day if that's what ittakes to say farewell.