Side headlock (wrestling)

Side headlock (wrestling) is the folkstyle-wrestling name for the head-and-arm control configuration — the same trapped-head-and-one-arm position that judo calls kata gatame and that BJJ uses as the arm-triangle strangulation setup.

Etymology. “Side headlock” is the standard American folkstyle and freestyle wrestling description of the position: the attacker’s head and one arm of the opponent are trapped on the same side of the attacker’s body, with the attacker’s bicep and shoulder closing around the neck. The “(wrestling)” suffix in this term disambiguates from the general “side headlock” usage in unattributed contexts, where the term can sometimes loosely refer to other head-control positions. In wrestling vocabulary the term refers specifically to the position used as a turning lever rather than a finishing strangle.

Mechanics. The configuration traps the opponent’s head and same-side arm against the attacker’s torso, creating a unified lever that the attacker can use to roll the opponent onto their back. Because the head and arm are isolated on the same side of the body, the opponent loses access to the trapped arm’s defensive function — the limb can no longer post or frame independently of the head’s rotation.

Cross-reference. Judo uses kata gatame; BJJ uses “head-and-arm” or “arm triangle setup” for the finishing version. Full mechanical coverage on Kata Gatame.