I don't think these moves are particularly similar to Twins moves. The Astros 3B is a pending FA, and they have gotten nothing out of 1B and DH this year (as well as an outfield spot, where they have two more pending FA too). They are also in a pennant race and need a bat or two regardless of position, something that didn't really apply to the Twins and Park last winter. Until they actually do something suboptimal with Bregman, this is not similar to the Park/Sano situation. Liriano's career isn't much like Pomeranz's either. Liriano actually was good to great a couple times for the Twins, and was traded as a pending FA, and has been a great FA value for a Pittsburgh playoff team (no need for them to sell high). I admit Oakland trading him last winter was really weird, but Oakland's weird moves are pretty unique. Giolito was a more aggressive callup, as you note, straight from AA to a contending team. Berrios had a fair amount of AAA experience already, was on a last place club, and got replaced by Pat Dean. The Nationals have the best ERA in the NL, largely in the strength of their rotation, with Strasburg, Scherzer, Roark, Ross, and Gonzalez (with a capable swingman in Petit).