Flyers General Manager Paul Holmgren said via Twitter Pronger's status remains day-to-day.
Pronger, 36, was injured Feb. 24 when his right hand was hit by a puck and had surgery on it March 15.
The Flyers and Sabres go into Game 3 of their Eastern Conference quarterfinals series knotted at 1-1.
Pronger, who also missed part of the season with a broken foot, has four goals and 21 assists.
Holmgren also said forward Andreas Nodl will sit out Game 3 with an upper-body injury.