There have been speculations that the Nashville Predators could make All Star blueliners Shea Weber and Ryan Suter available prior to the deadline, though the Flyers would want assurances that they can sign one of them to a long-term deal.
Meanwhile, Holmgren could look to Carolina where two defensemen with the potential to become unrestricted free agents, Tim Gleason and Bryan Allen, are on their list.
Other available blueliners include Toronto Maple Leafs' Luke Schenn, whose brother Brayden is already in Philly, former Flyer Mark Eaton of the New York Islanders, and Montreal Canadiens' Hal Gill.
The 36-year-old Gill, at 6-foot-7, 241 pounds, could replace the size the Flyers are missing with Pronger sidelined.
The Flyers currently sit in fourth place of the Eastern Conference with a 29-14-5 record.
More Trade Deadline Info
List of Trades
| No-Trade/No-Movement Clauses
| Top 25 Available Players
| Team-by-Team Cap Info