Throwing out the idea that no prospect is untouchable in a trade pick one pitcher and one position player. My choices
Position Player: Soto
I almost went Yorman here as the OF is mighty thin right now. Yorman can post some big numbers, Duran too if both are in Bakersfield this year, but Soto makes Votto, not expendable, but at least we aren't looking at a Hal Morris like replacement. Soto has ridiculous power and was athletic enough to be considered at Catcher. Came up as a SS and quickly aoutgrew the position. He's got warts, but he's my untouchable.
Sulbaran? well I just posted what I think of him. I think he's the best Reds starter in the minors. period. He's an ace in the making.