The Brewers picked Wei-Chung Wang in the Rule V and he'd only pitched in Rookie League. It's a little different situation than Kepler, but there's still a risk of losing him. The terrible teams these days acknowledge they are rebuilding, there's a chance that a team like the Marlins would grab a guy they knew couldn't help this year, the Twins did it with Johan Santana after all, he had never pitched above A ball. I know if another team left a high ceiling prospect available to snag, I'd campaign for the Twins to keep a spot open for him. After all, how much are you truley losing having dead weight in Kepler on your bench instead of Mastroianni, or Clete Thomas or Wilkin Ramirez?