BJJ Scout's BJJ Digest: Tonon vs Hall Dream Match-Up, Yuri Wrestling Superfight? et al

Great moments in leg lock history: Ken shamrock hits first leg lock in the UFC

Jump to roughly 1:05 to catch it. I wasn't able to find the fight in it's entirety, but it's a familiar tale: striker with no grappling training whatsoever faces grappler and gets submitted with someone he does not understand. The world of martial arts changed forever.

Great Moments in Leg Lock History: Kazushi Sakuraba vs Carlos Newton

Couldn't find the full match itself, but you can see the kneebar if you jump to 1:17 of the video embedded below.
Known more for his rivalry with the Gracie family and the Kimura, his record actually reveals a diverse array of finishes with a variety of submissions.

Thanks to Twitter Deal - OneFC Saturday Event Broadcast Free

This Saturday in the morning you can watch the prelims for the OneFC event (mainly I care because Masakazu Imanari returns to action).

Great Moments in Leg Lock History: Minowaman vs Bob Sapp

Say what you will about Bob Sapp. Finishing a guy with legs the size of my torso is what it is.
We'd be remiss to fail to mention Minowaman in this stroll through the early days of leg locks in MMA (well, mixed martial arts of the modern-ish era outside of Vale Tudo).

Masakazu Imanari Returns Jan 20th to OneFC

Nothing wrong with some leg locking action in MMA. The Ashikan Judan , Imanari, has torn apart knees of the likes of Jorge Gurgel, Matt Brown, and many others. He's only been stopped 4 times in 50 pro fights. Regardless of how or when his career stops or ends it's hard to believe he won't be the ultimate leg locker in MMA history. 

Leglock Friday: Rousimar "Toquinho" Palhares vs Jon Fitch @ WSOF