One thing to be wary of is that relievers in general are a very fickle bunch- they are unhittable one season and may be washed the next. Hell, we’ve seen first-hand how volatile relievers can be seeing how we’ve had a long list of relievers who fell apart suddenly after having dominant seasons (Axford, Knebel, Thornburg, Jim Henderson, Hoffman, Turnbow, Williams, Payamps). I’m not saying we shouldn’t trade for relievers at all, but we should be very careful about overpaying for them.
Letting go of Jett Williams makes sense- he hasn’t exactly dominated in AAA and I’m not sure where he belongs on the major league team considering we have more talent set to come up in the near future. Peña I’m more reluctant on given that he is one of our best prospects. Henderson I’m on the fence about- he has been getting hurt pretty often, but is also a quality starter when he’s healthy. I can see why our FO may be hesitant in dealing him, but I can also see our FO wanting to sell high on him too. That being said- if Henderson’s gone, who’s stepping up in the rotation?