Sorry to post what may be a redundant question, but it's been a while since I was faced with this decision.
I am considering playing a C+/D 3B at 1B or RF to spell the guys I have there. He is not rated at either position. How poorly would I expect him to perform? My guess is he may be tolerable at 1st, but may be a disaster in the outfield. His offense is quite good though (2003 Bill Mueller) so I think it may be worth it, rather than drafting a backup at one of those spots...unless I find one with a great glove. It's a progressive, so it may not be too easy to do that.