Drysdale (upper body) was activated off injured reserve Wednesday, per Jordan Hall of NBC Sports Philadelphia.
After participating in the morning skate as part of the second pairing, Drysdale will return from a three-game absence against Buffalo on Wednesday. The 23-year-old blueliner will look to pick up where he left off after earning eight points over his last 16 games. He has three goals, 15 assists, 45 shots on net and 41 blocked shots through 41 outings this season.