Who's Rooker? (Oh, you mean Rucker. He's not going to be around for long. No chance they acquire another reliever, they have a surplus of long men including extra starters both in-season and post-season.)
The only question now is the pecking order.
Estevez
Hoffman
Strahm
Alvarado
Kerkering
(those are your 5 best, Thomson did not use more than 5 in meaningful spots last October)
Soto
Ruiz
Marte
Rucker
Either Rucker or Marte go down if they call up a starter for Ranger (right now Estevez took the spot). Neither will pitch in October. Ruiz might be the lowest-leverage guy/mop-up. Or maybe he still steps up. Soto might get a few LHBs in early innings if the leverage isn't too high.
I would still like to see a LHB for Wilson but I wouldn't say the bench is weak at all. Stubbs is fine (he already proved that when JT was out), Sosa is great, Rojas is now the 4th OF in theory. If Wilson was LH I'd stick with him. You're talking about a spot that is barely used. Would be great to find Matt Stairs or Justin Bour but the argument for Clemens (because he's an INF and our 3B and SS are RHBs) is still strong.
Any one of those guys can go 1-3 pinch-hitting in the playoffs. None of them will start, and nobody else the Phillies would get is anyone you'd want to see start (in event of injury) either.