Jeter's career FRAA is -129. Saying Greene is better than Jeter defensively is like saying that Ryan Theriot is better offensively than Cesar Izturis. Could you link me to something that explains FRAA? I'm really interested in Sabermetrics, and while I have a good understanding of most offensively, i'm still learning. it's just Fielding Runs Above Average. A guy with a FRAA of 0 is an average shortstop. Jeter's -129 FRAA means that as a result of his defense, the Yankees have allowed 129 more runs than if they had an average shortstop. This assumes, of course, that FRAA is a perfect stat, which it's not, but it's miles better than the more commonly used fielding statistics like errors, fielding percentage, zone rating and range factor.