Al Roker Is Undergoing Shoulder Surgery

Al Roker was missing from the "Today" show Wednesday morning.

That was because the co-host was undergoing surgery for his shoulder. Roker tweeted,

It is not clear how long it will take him to recover, though the American Academy of Orthopaedic Surgeons says that rotator cuff surgery patients typically wear shoulder slings after the procedure and practice physical therapy exercises for several weeks. Dylan Dreyer filled in for Roker on Wednesday, while the "Today" show wished him the best: