Regarding Nolan Reimold, before this season he had all of eight games where he played left field in the minors, and he only had nine fielding chances there. I think it is appropriate that he does not have a rating in left at the start of the 2009 season. On the other hand, I do feel the game underrates his offense.
Nolan Reimold Minor League Statistics & History - Baseball-Reference.com
Dunn, on the other hand, has amassed significant time in right field in recent years, and deserves a rating there.
Adam Dunn Statistics Batting | FanGraphs Baseball