When the Giants pulled off that late season "trade" with the White Sox for Roberto Hernandez, Wilson Alvarez and Danny Darwin, it seemed as if they'd landed two stars and a throw-in. Well, lo and behold, the throw-in is the only one still in town. Not that Darwin, a 42-year-old veteran, is complaining. With a rubber arm and the ability to start or relieve, he'll get lots of work on this shaky staff. In fact, Darwin will be a good index of San Francisco's success: If he starts more than 10 games, that means injuries or ineptness are still plaguing the Giants. Darwin's still got some juice, but not enough to regularly start for a contender.