Gary Sheffield has officially retired and has made his case for the Baseball Hall of Fame. Twenty years ago, a baseball star with over 500 Home Runs would be an automatic lock for the Hall of Fame. That is not the case anymore now is it? Sheffield's career stats are solid, there is no doubt of this. He hit 509 Homers, was a nine time All Star and a five time Silver Slugger. Subsequently, his 2,689 Hits and 1,676 Runs Batted In are also impressive tallies. Still there are three things that worl against him. Journeyman Perception. Sheffield may have…