Matt Williams is out second real superstar thus far, the other being McGwire. He was a sure handed third baseman who won four gold gloves. And at the plate he was a feared power hitter. Though he never put up the home run totals that some sluggers of his generation did, he still managed to put 378 balls over the fence. In 1994 he was chasing the single season home run record when the strike cancelled the rest of the season.
Williams was involved in the deal that sent Jeff Kent to the Giants for the 1997 season.
Since his retirement, he's been linked to steriods, HGH and other drugs in several different reports.