Damarchus
Damarchus (Greek:Δάμαρχος) (~400 BC) - A victorious Olympic boxer from Parrhasia (Arcadia) is said to have changed his shape into that of a wolf at the sacrifice of Lycaean Zeus, and nine years after he became a man again.
References
- Pausanias, Description of Greece 6.8.1 http://www.perseus.tufts.edu