If you add 'unexpectedly' to BigSlick's original question, I think you could go back to Edmonds. All the young guys were fun their first 50 ABs, but in a vacuum none of their successes were all that surprising. Edmonds was cooked and what he did was so out of left field; Bote wasn't considered a major prospect so what he's doing has been a nice bonus.
It was, but if Chatwood wasn't terrible he wouldn't create high-leverage situations where a reliever was needed in the fifth freaking inning every start.
I'm prepared to be proven wrong, but I saw a Tweet saying Happ's price was too high for some clubs, and if we can't get him for something approximating a bag of balls, I'd be surprised if Theo made the move.