I agree that Betts, Bogaerts, Edro, Swihart, Pedroia, Ortiz, Sandoval, Ramirez, Porcello and Miley are here to stay, at least for 2015. Either they are the future, they are icons, or they are sunk costs who will probably be better in 2016.
Napoli has no current value, and will get another 30 games of at-bats to generate something -- anything -- that makes him worthy of a waiver-wire deal. Victorino has only marginally more value. We'll see a lot of them, and then we'll see the backs of them forever. Here's hoping that three little birds fly off to a playoff team.
There are only a few names that have value on the trade market for 2015 competitors, and they are all relievers:
Tazawa, who is highly effective in relief, and still cheap at 2.25m. He will start getting expensive after another year, so perhaps this is might be his peak value for a GFIN contender.
Koji has plenty of value, but his price may discourage trading partners. Still, a playoff contender in desperate need of a closer has to like what Uehara has shown in 2015.
Layne might have value as a LOOGY, depending on contenders' needs.
Ogando has been a disappointment, but not a disaster: his velocity is intact and a contender might value his experience.
Masterson might have value if he shows well as a reliever, and the Red Sox subsidize him. With his price tag, he'll likely clear waivers.
There are a few more assets whose value depends on the kindness of strangers:
BrockHolt is unlikely to bring an offer that would outweigh his value to the Red Sox, but all it takes is one team to prove me wrong. Holt is 27, and like Pedroia and Betts, his best position is 2B.
Castillo can field, run, throw and hit for power, but it's not clear that he can fight off major league inside fastballs. If the Red Sox despair of him learning not to lean, maybe another GM will take a flyer.
Kelly can throw hard, but he's wild in the strike zone. If the Red Sox despair of him commanding his stuff, maybe another GM will take a flyer.
BrockHolt might be of use to a contender; Castillo and Kelly would be bets on 2016. I think all three will stick around for another year.