Despite this, Jeter's defense was the subject of criticism from a number of sabermetricians, including Rob Neyer and the publication "Baseball Prospectus". The 2006 book "The Fielding Bible" by John Dewan contains an essay by Bill James in which he concluded that Jeter "was probably the most ineffective defensive player in the major leagues, at any position" over his entire career. A 2008 study by researchers at the University of Pennsylvania found that, from 2002 through 2005, Jeter was the worst defensive shortstop in MLB. Two sites that rely on advanced defensive statistics, FanGraphs.com and FieldingBible.com, rated Jeter below middle-of-the-pack status in 2010, despite his receiving his fifth Gold Glove Award that season.