Sean Kanan: Sean Kanan. Actor: Cobra Kai. Sean Kanan's career encompasses many facets of the entertainment world including actor, author, comedian, and producer. Early in his career, Kanan was chosen at an open call by Oscar-winning Director, John Avildsen from over 2000 hopefuls for the role of Mike Barnes in the Karate Kid III. He went on to create two iconic characters, AJ QUARTERMAINE (GH) and DEACON SHARP (B&B/Y&R). Kanan's popularity as...