Here's what I would do. First, I'd probably promote Sano to AAA come mid-June assuming he's continuing to hit the way he's hit in April. I'd have him finish out AAA and likely give him a September callup to DH and play some 1B and 3B on occasions. I'm assuming (a reasonable assumption, but one that could be wrong) he does well enough to earn consideration for the 2016 season, and if that's the case, you have these options: 1) Trade Plouffe, who I think would net a top 100 prospect that is relatively near ready and quite possibly more. Like someone else said, a C prospect would likely the most obvious option given the lack of good talent there, but I could see high end pitching or an up the middle prospect as well. Plouffe is that valuable. 2) Move Mauer. I realize that the chances of this happening are slim, but I really think that Mauer needs to go back to C. At his current numbers, he's an above average catcher and played some decent defense there too. You could put Sano at 1B and help him acclimate to defense in MLB as 1B and 3B are relatively similar (minus the long throws). Consider bringing Sano back to 3rd when Plouffe's time is up. 3) Keep Plouffe for 2 years shuffling Sano in and out of the majors, offer Plouffe arb with the expectation that someone snags him in FA and gives away a 1st round pick or high second round pick. There's a benefit here in that Sano can fill in for injuries to Mauer or play DH if we continue to see ineffectiveness from Vargas/Arcia. I'm not sure what I'd do here. I can see pros and cons to all of these. The truth is that Plouffe is going to be on the downside of his career in the near future. I think it's reasonable to expect him to maintain a good level of production for 2 more years, at which point arb might work. Trade would guarantee a good piece now. There's risk/reward for each option. I think if Sano destroys opposing pitchers in his callup, I'd probably trade Plouffe, even though I really like him.