MADEIRA HILLS, OHIO — Trevor Coleman, a 31-year-old four-stripe brown belt who teaches the 6:30 and 8:00 no-gi classes two nights a week at Maplegate Jiu-Jitsu, a suburban Cincinnati academy that shares a parking lot with a Jersey Mike’s and a vape shop, sold out last Saturday’s four-hour $197 seminar on ‘The Z-Lock Chain From Seated Guard’ to a capacity crowd of 48 paying students, none of whom asked the one question everyone should have asked first.
That question, asked roughly 37 minutes into the Q&A by an unnamed blue belt visiting from out of town, was: ‘Sorry, have you ever actually hit this in a match?’
Coleman, according to three separate attendees, paused for approximately eleven seconds, adjusted his knee sleeve, and said: ‘Positional sparring is live rolling if you frame it right.’
He then moved on to the next question.
The question was never answered because Nathan Osterholm, a skeptical 28-year-old purple belt who works as a tax accountant at a mid-sized firm in Blue Ash and who attended the seminar on a comp ticket after trading favors with one of the organizers, had already answered it for him. Osterholm had spent the previous Thursday evening pulling Coleman’s entire competition record from three public open-circuit databases — Smoothcomp, BJJ Heroes, and a regional no-gi bracket archive maintained by a retired referee in Dayton — and screenshotting the full document into Maplegate’s members-only Signal thread under the subject line ‘Guys. I found something.’
The numbers, now confirmed by two additional sources who asked not to be named because they still owe Coleman money for a seminar deposit from February, are as follows:
Coleman has 23 recorded regional no-gi matches, dating from 2017 to 2022. Across those 23 matches, he has attempted zero z-locks. He has attempted three guillotines. All three guillotines failed, two by escape and one by time expiring. He has one disqualification — a 2019 regional event where he was DQ’d for reaping the knee of a fellow four-stripe blue belt, a detail that, according to Osterholm, ‘feels thematically important’ given that the Z-Lock Chain involves heavy rotation around the knee line.
Coleman’s most recent competition match was on March 12, 2022, at a regional no-gi open in Lexington. He lost in the first round by 50/50 heel hook at 47 seconds to a 17-year-old brown belt from a Renzo affiliate. Coleman has not competed since. When asked at the Q&A whether he planned to return to competition to demonstrate the Z-Lock Chain in a live setting, he said: ‘Competition is a limited stress test. The seminar format allows for deeper transmission.’
Attendees reported that the seminar itself was, in the words of one orange-belt-adjacent visiting white belt, ‘actually pretty good.’
‘He really explains the grip sequencing,’ said Marcus Fenning, a 34-year-old blue belt who drove two hours from Louisville, paid $197 at the door, and purchased a $40 ‘World Guard Passing Authority’ branded rashguard after the seminar. ‘I think I learned some stuff. I don’t know. It was four hours. I’m tired.’
When pressed, during a separate segment of the Q&A, on whether any video evidence existed of the Z-Lock Chain being hit in his personal training room, Coleman said: ‘It does, but the angle’s bad.’ Asked where the technique was originally developed, he said: ‘I put it together over a weekend with a coach I can’t name.’ Asked whether the coach was Keenan Cornelius, John Danaher, or Gordon Ryan, Coleman said: ‘I said can’t, not won’t.’ Asked to elaborate, Coleman said the seminar was running long and pivoted to a water break.
Maplegate Jiu-Jitsu, the academy where Coleman teaches, has already booked him for a follow-up seminar scheduled for May 23. The title is ‘Advanced Standing Guard Passing.’ According to the same public competition records pulled by Osterholm, Coleman has never completed a standing guard pass in a recorded match. His closest attempt was a stalled knee-slice in a 2020 semifinal that ended in a referee’s decision loss.
Pre-registration for the May seminar is $175 at the early-bird rate, with general admission climbing to $225 on May 1. As of Tuesday morning, 31 of 40 available seats had been sold. The event flyer features three black-letter testimonials — ‘Trevor unlocked a world of passing for me.’ (Doug Bergland, black belt, Maplegate) / ‘I’ve been in the game 22 years and I learned something new.’ (Ron Patel-Schimmel, black belt, Maplegate) / ‘This is the real deal.’ (Rick Vetter, black belt, Maplegate) — all three of whom teach at Maplegate, share an office, and split commission on seminar ticket sales.
Coleman’s Instagram bio was updated at 11:47 PM last Saturday, approximately forty minutes after the seminar ended, to read: ‘World Guard Passing Authority • Author of the Z-Lock System • Book a seminar ↓.’ The link in the bio points to a tour page titled ‘THE Z-LOCK TOUR 2026.’ The tour is four cities. Three of those cities — Lebanon, Mason, and Florence — are strip malls within an hour of Maplegate. The fourth is Indianapolis, a two-and-a-half-hour drive, and is listed as ‘TBD pending venue.’
Asked for comment on the documentation Osterholm posted to the Signal thread, Maplegate head instructor Rick Vetter, a second-degree black belt who has himself never attempted a z-lock in recorded competition, said that Coleman’s competition record ‘is not the relevant metric here’ and that ‘a lot of great teachers aren’t great competitors.’ Asked whether any great teachers at Maplegate had ever attempted a z-lock in any recorded setting, Vetter ended the call.
As of Wednesday, Osterholm’s original Signal message has been screenshotted an estimated 240 times and has been forwarded to at least three other academy Signal threads in the greater Cincinnati area. Coleman has not addressed the document publicly. His next seminar is Saturday. It is, as of press time, 78% full.