Any pipeline isn’t completely homegrown from draft classes, for any team, that would also be unsustainable and require one to never miss on a draftee which is impossible. Building a pipeline also happens by trading vets for prospects in down years or rebuild years. I agree that we can’t sustain this by trading prospects for major league ready pitching, but that list shows that we haven’t done that. Ryan was acquired by trading Nelson Cruz, when we were no longer in contention, Duran by trading Escobar when we were no longer in contention, and Alcala by trading Pressly. And in some of those cases we trade major leaguer for major leaguer as was the case for Pablo López PLUS acquired a nice addition to our position player pipeline. And, it could be argued that we traded for Maeda, a major league starter by using a major league ready reliever. Same with Paddock and Pagan … major league for major league. Now, you can argue that you didn’t like some of those trades, but the bottom line is we didn’t use just prospects to acquire those pitchers. That would truly be unsustainable, but that’s not what we did.
IMO, I consider Ryan, Duran, Jax, Moran, Alcala all from our pipeline. Even maybe Thielbar. Because you also fill out the pipeline with minor league signings that turn out.
And then there are several on the cusp or coming … Ober, Winder, Balazovic, maybe Sands will go the Jax route, etc.