I was thinking about that Loshe, Ortiz, Garza, Bartlett, Ramos, Hardy, Jones, Santos, Humber, and Young were all average or worse for us and then got better once they were traded or signed elsewhere. I know it's not universal but it looks like a pattern to me. We do seem to "miss" on a lot of draft picks or players never really reach their "potential" with us and there are probably several factors like scouting, training, and coaching. Overall in our system I just see a lot of consistencies and it just seems like we don't develop well. Again that might just be me, I'm not a professional.
---OK a few things here:
1) With the names you're throwing out, you're stretching this out to almost a decade.
2) It's not like you have the ability to keep unlimited players on the major league roster. Eventually things get crowded, you run out of options and you have to make decisions. Every team has to deal with that, not just the Twins.
3) I would bet you could take any organization and come up with a list of guys who they let go or traded over the last 10 years who went on to do better things elsewhere. And for some organizations, they would be much more impressive lists than this one.
4) In that time, there were also guys the Twins acquired who did better here than they did where they came from. Nathan is one obvious example.
5) There are a couple of bad trades represented in this list for sure but every situation is different, and I don't think you can fault the Twins on every one of these. Take Lohse for example. He was given plenty of opportunities here, didn't do much with them, and had worn out his welcome. He really didn't hit his stride until he got to the Cardinals several years later.