Why would Buffalo want Borgen back they pretty much have their defensive line-up set with Dahlen,Jokijarju,Hagg and Butcher with youngsters Power, Samuelsson,R Johnson waiting in the Wings
The Dahlin-Joker line is the only certainty on the back end in Buffalo right now. They lost McCabe, Risto, Montour and Borgen.
Hagg is a stop gap at best, and was mostly included in the risto trade as a cap dump for Philly.
They brought in Butcher to help take some of Risto's PP minutes, but he replaces nothing that Borgen brought. Miller is an offensive D-man that is weak in his own end and is UFA, and is likely be moved this season, and Bryson has been pretty unreliable and underwhelming so far.
Power should be in Michigan this season, and who knows when or what role he will be up for when he does arrive, and Johnson will probably be in the AHL for a couple of years before he will be ready.
Borgen and Samuelsson played alright as a 3rd pairing down the stretch last season, and the hope was they could do it again this year. They spent a lot of time developing Borgen and not rushing him, and he was supposed to be the physical, penalty killing D of the future. If Seattle waives him, guaranteed Buffalo will take him.