I was just looking at his statistics (http://www.baseball-reference.com/w/willima04.shtml) - the Giants definitely let him go at the right time. He only played one year in Cleveland, and then many in Arizona, and he was never as good again, though 1999 was nice.

BTW, did you know that in the 162 games starting from the beginning of the 1994 season and then including however many games of 1995 it takes to make up for the ones missing from 1994, Williams hit 62 home runs?