Here's my stab at it: Dusty has Nevin playing first because he has some pop and because a few pesky press types were asking why the Cubs bothered trading for him if he was never going to play. But Nevin has a questionable glove at 1B, pluswhise Nevin was too sore to play the field for a couple of days after his first start at 1B (riiight). Since DLee is still out, Nevin is now the bat guy at 1B and the default 1Bman. But since he doesn't have a great D-reputation and you have a young guy playing SS, you need a good glove at 2B to compensate for both. Neifi is a good option since he switch hits and has a good glove. Nevin's bat replaces Walker's bat, and Neifi's glove is better than Walker's glove. That's the best I can come up with.