Swihart would be the headliner on a package, in theory, to get a solid pitcher.
I have contended that Blake's value as a starting catcher on another team is more than his value as a platoon LF'er/3rd string catcher for the Sox. Please do not take this to mean I value Swihart less than any of you do. I still think he is a great young talent with high value.
My second major piece would be Devers. I realize that Shaw is still not a sure bet at 3B, and with HanRam possibly being our DH next year, trading Devers could be viewed as risky. However, I think Moncada's ultimate landing spot might be 3B, 1B or DH (with LF as another choice). We also have Sam Travis and Pablo Sandoval in the mix at 3B/1B next year, if Shaw falters. I think these facts essentially mean Devers is all but blocked. Again, this does not mean I devalue Devers. I just see his value as being greater for another team, and that is a foundation for making a trade offer.
So, my choice for making a serious offer for a solid #2 type SP'er would start with Swihart and Devers. To improve our chances at getting the best (non rental) SP'er out there for this portion of a package, we could do one or more of the following:
1) Take on a high salary pitcher or add another high salary player as a salary dump (like Mike Lowell was in the Beckett deal).
2) Offer someone like Castillo or Pablo with just about all their salary paid, assuming the other team wants one.
3) Widen the package with a vet or two, if the team is looking to seriously compete next year (such as Holt or Kelly/Buchholz/Barnes/Elias/Layne)
4) Widen the package with mid-level prospects such as...
Kopech, Owens, Johnson, Lakins, Light, TBall, Stanki/ K Martin/C Acosta
Marrero, Hernandez, Dubon, Chavis, Longhi, Ockimey or maybe even Travis
Basabe or Yoan Aybar
5) Offer cash
I'd try hard to do any of the above, before I part with Moncada, Benintendi or Espinoza.
Note: just because a guy like Sam Travis is ranked 5th in our system, doesn't mean his value is equal to other teams' #5 prospect. Not many teams have 4 top prospects like ours.