Patrick Willis recently underwent thumb surgery

According to Matt Barrows of the Sacramento Bee,  49ers linebacker Patrick Willis recently underwent thumb surgery.

Add Patrick Willis to the list of 49ers getting off-season tune-ups. The 49ers’ inside linebacker had recent surgery on his left thumb and is now in a cast, as recent photos from his Instagram account show and as a league source confirmed.

As you can see from the photo below, Willis’ thumb is in a cast.