Pearce is an interesting one. WS hero and Sox fan, 35 years old and not likely to get a long term deal anywhere. The only issue is, do the Sox need a RH 1b option? If money is an issue, they might save a little by going with Travis and eventually Chavis.
Pomeranz does seem like a no-brainer to let walk. But if he returns to form, he also might be the bargain on this free agent class. This guy was a stud as recently as 2017.
With Holt and Nunez on this team, the depth Swihart provides might make him more valuable as a trade chip. And unless he becomes the RH 1b option, there may not be enough room to keep him on a 4 man bench. The Sox might already have that entire bench filled with Holt, Nunez, Leon, and Pearce/Travis/Chavis...