In my book The Fielding Bible, I developed the Plus/Minus System to evaluate defense for individual players and teams. Texas first baseman Mark Teixeira came in at the top of the first base list with a +17 for 2005 meaning that he fielded 17 more plays than would be expected from an average first baseman. However, a key component of a first baseman's defense that isn't counted in the plus/minus system is the ability to save outs on bad throws made by fellow infielders.