Defense is one of the trickiest things in baseball. It's nebulous, intangible, very, very hard to measure and never truly appreciated until it's gone. The Gold Glove, one of baseball's most prestigious awards, is also one of the most criticized, as fans clamor for their own players to win the prize.
As sabermetrics and statisticians have developed more and better metrics to analyze offense, defensive metrics remain controversial and inefficient. What is an error? Is good defense defined by the ability to lay one's body on the line and make a diving play, or by the speed, range and instincts to get to the ball before the last second?
Given the lack of reliable information, sometimes it just comes down to anecdotal evidence, a player's reputation, and the faith his teammates have in him to make the play when it's necessary.
Here are the best defensive players in San Francisco Giants history for each position.