Let's count the injuries on defense, now: Braydon Coburn, Nicklas Grossmann, Nick Schultz, Carlo Colaiacovo. Throw in Kimmo Timonen and Chris Pronger if ya want, too. They're still on the roster.
The Flyers are at home against Pittsburgh in 25 hours, so there will likely be a recall. Or two. Without Schultz and Colaiacovo, there are only four healthy defensemen on the roster.