According to Corey, Tyler Sloan has been called up from Hershey. Sloan, a gritty stay at home defenseman, will most likely make the western swing road trip with the Capitals. This might also put the kibosh on Sergei Fedorov's time as a defenseman (for now).
This also means that Tom Poti, Donald Brashear and Viktor Kozlov may not make the trip.
The Capitals are a bit up against the salary cap, which maybe the reason Karl Alzner's name wasn't called. The Caps would have to take his signing bonus into account, and that would put the Caps over.