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. Thanks. But doesn't this stat rest alot on how good your starting pitching is? It seems like it should, though seeing a guy like Jack Wilson that high proves otherwise. I mean if a SS gives up a baserunner due to subpar defense but his pitcher always seems to get out of it with no runs, wouldn't it be a little misleading? It seems like the Redsox SS for example would be ranked alot higher than the Pirates SS (though that doesn't seem to be the case). I have a feeling I might be wrong though and it deals more with MLB offensive averages than individual team averages though.