Finally checked it out a bit. Just from looking at the leaderboards, it appeals to what I've observed. Konerko, McGehee, Wallace, C. Jones, Ortiz, Howard, Yadier all in the bottom 10. Mostly athletic players on the leaderboard. I wonder what the rule of thumb will be in terms of seasons for this statistic to stabilize and be meaningful. There doesn't seem to be as much noise as UZR data just by looking at it (Prince is always negative, Braun always positive). Fielder in his career is a -25 in UBR, which I guess seems pretty reasonable. Konerko is the worst since 2002 with a -44. Juan Pierre and Figgins are top two, both just over +40.