He's a below average fielder in right, and he's 31 now. I always sort of got the impression that he was a good fielder, and he definitely has a great arm, but looking at the numbers right now, he's generally negative (-5.5 career UZR, 1 positive UZR year in the past 6, last season actually...).
http://www.fangraphs.com/statss.aspx?playerid=5930&position=OF#fielding
Another guy I wouldn't mind on a short term deal, but wouldn't really want him for a longer contract. O's are smart to not want to go 4 years with him.