UZR tallies runs prevented by different aspects of defense. So in 2008 Soriano got 4.7 runs from his arm, -1.1 for his range, and -1.0 for errors. http://www.fangraphs.com/statss.aspx?playerid=847&position=2B/OF This year he's "stunk" but looking at corner OF UZR ratings at this point is really foolish, like looking at BA after the first week of the season