Why mess with Mauer more than need be? Sano is still going to get every chance to stick and 3rd and should for at least the first part of his pro career, so why make Mauer learn 3rd when he is coming and Plouffe is there as a stop gap. If you moved Mauer off 1st right now guess who would be starting there...... Plouffe, so why arbitrarily switch them. Deduno is there in the pen as possibly the 6th starter when someone falters or gets injured, but he profiles better as a reliever anyway.