He's 35 years old. He has a 1.5 WHIP this year. He already cleared waivers but some team might sweeten the pot for him if they want. It won't be the Phillies because other teams are going to need him more.
Priority has to be fixing the guys who are already here. If they really need another reliever at this point than trading Seranthony really was a mistake, and so was Banks. Was Estevez?
I'd sign him next year to replace Hoffman if you assume Estevez is coming back (or vice-versa). But it won't be for more than Strahm makes.