Ronald Winston Yuan is an American actor, martial artist, director, and stunt choreographer. He is best known for his roles on Sons of Anarchy, Prison Break, Golden Boy, and CSI: NY. He has acted in numerous films, including an ensemble lead as Sgt. Qiang in Disney's live-action adaptation Mulan. He also supplied the voice of Sgt. Fideltin Rusk in the video game series Star Wars: The Old Republic, and Scorpion in Mortal Kombat 11 (replacing Patrick Seitz) .