Boston crab

In modern wrestling, the Boston crab is not treated as a lethal submission maneuver, even though it was considered a match-ending hold in the past.

[2] On September 30, 2017, Jonno Mears became the first fighter in mixed martial arts history to win a fight with the Boston crab.

[3][4] Similar to a normal Boston crab, this move sees the attacking wrestler use a single knee to add additional pressure by pressing it into the opponent's back.

[1] Similar to a normal Boston crab, this move sees the attacking wrestler stand farther back.

[8] WWE.com describes the Stretch Muffler as a modified version of the Boston Crab in which a wrestler places their opponent's leg over their neck and begins to crank down.

[9] This variant of the move is considered to apply pressure primarily to the knee of the opponent rather than the other versions of the Boston Crab which focus on the lower spine.