I don't know, and I don't care. I didn't report him. He made a clean leave though. It wasn't a dc.
I can give you the replay if you want. It was 4v5 on our side (warlock left first at the very beginning), and when I thought all was lost, they started doing bad moves, and in the end we kicked their ass. Looks like a ragequit to me. Maybe I'll report him after all.