ONE heavyweight behemoth and 17-time Brazilian jiu-jitsu world champion Marcus 'Buchecha ' Almeida has 72 submission wins on his jiu-jitsu record. That's within his 138 wins in grappling competitions. Want to know what's even crazier? This man only lost 14 times and was only tapped four times.Considering the level of competition he's faced on the mats, that's unheard of. No wonder many people consider him the most accomplished jiu-jitsu competitor in history. View this post on Instagram Instagram PostIf you crunch the numbers on Almeida's grappling career, it will blow your mind even more. Amongst his notable achievements is winning the International Brazilian Jiu-jitsu Federation (IBJJF) World Championship open-weight gold medal six times. Almeida also broke the great Roger Gracie's record of absolute (open-weight) gold medals at the ‘Mundial’ tournaments, one of the most prestigious in the sport.Upon first glance, you'll notice a major anomaly in how Almeida moves. His pace, speed and agility are akin to that of a lightweight fighter. His size, however, belies his athletic ability. It just doesn't make sense for a person of that size to be moving like that. View this post on Instagram Instagram PostNow that he has transitioned into MMA, it's a new world for 'Buchecha' to conquer. Winning his first three fights via stoppage, the jiu-jitsu master has fully embedded his grappling game into his MMA arsenal.His trademark blast double-leg takedown and heavy pressure passing are evident in all of his fights. His submissions, however, are still yet to be properly showcased. Having won two submission wins (north-south choke, rear-naked choke) inside the circle, we still haven't seen the very best and most lethal weapons Almeida has on the ground.Before Marcus ‘Buchecha’ Almeida takes to the circle at ONE 161 against former ONE world title challenger Kirill Grishenko, we take an extensive look into Almeida's grappling career and see which submissions are the most lethal in his grappling toolbox.ONE 161 will broadcast live from the Singapore Indoor Stadium on Friday, August 26, at US primetime.#3. 'Buchecha's Kimura LockThis one's directly connected to Almeida's legendary pressure-passing game and suffocating top control. The Brazilian heavyweight has this way of pinning his opponents on the mat with absolutely no space for them to wiggle out.His last showing inside the circle showed us a glimpse of what it looks like to be underneath Almeida's locked-in top control. In a video with ONE commentator Mitch Chilson, the grappling icon explained how he manages to keep his opponents immobile while he's dropping all his weight on them.Watch the video here: View this post on Instagram Instagram PostRegardless of whether he's in half-gaurd, side control or mount, if you allow Almeida to pin your shoulders on the mat, you're in trouble. With regards to the kimura lock, 'Buchecha' applies it mostly from top position, pinning his opponents and isolating one of their arms for the excruciating reverse key-lock. The 17-time BJJ world champion has scored three wins via this submission.It's quite frightening as Almedida has an unparalleled handling of the technique. Once he gets into position and locks you into place, he'll methodically work for the finish. The worst part is that you'll just watch him do it to you because he's put you in a tight position where you cannot do anything about it. Absolutely bone-chiling.Watch him break down his kimura lock in this instructional video: