I very much disagree. Seranthony is still a great and experienced reliever with a track record. Lorenzen's a train wreck and Walker, it's not something you can fake, it's a routine thing, and he wasn't told to prepare to pitch in relief for the past month. If either of those guys are pitching it will be because the Phillies are losing or need bulk or both.
That said, Walker probably gets the start over Sanchez next round right?