PMR has Dunn a little above average for a leftfielder, above such players as Shannon Stewart, Jason Bay, and Todd Hollandsworth. He's always had relatively good speed for a guy his stature, and obviously he's not going to drop many more balls that hit him in the glove. He'll never win any gold gloves for sure, but he's far from a fish out of water in LF. And UZR had Alou as an above average defender in '04. I don't trust defensive metrics for much of anything. EDIT: Upon looking at the link more closely Alou is also rated as above average for last year. (Even better than Dunn) There's just far too much noise for defensive metrics to be very reliable. If I hadn't seen Alou lumber around the OF incompetently for 3 years, maybe I'd buy into the data a little bit more.