So that's what it was. This is according to Mike Gambardella (and probably other reporters who found out before him). This is the full tweet: Mike Napoli was diagnosed with avascular necrosis. It's poor blood supply that can kill cells in bone tissue. He currently has no symptoms. Right now, I'm having a "suddenly the past 51 days make sense" feeling. Random Music Album: Hadestown by Anais Mitchell Random Musing: Listing nouns is not "being random." America