Ethan Crelinsten

CANADIAN·NO-GI·B-TEAM JIU-JITSU·RENZO GRACIE ACADEMY (FORMERLY)

Canadian no-gi competitor and founding B-Team member whose game centres on leg entanglement entries chained into back attacks. Notable for consistent results at CJI, WNO, and ADCC events at the middle weight classes.

is a Canadian no-gi competitor whose game is built on leg entanglement entries that chain into back attacks rather than terminating at a heel-hook finish. He developed at the Renzo Gracie Academy in New York during the late Danaher Death Squad period and was a founding member of B-Team Jiu-Jitsu after the 2021 split. His distinguishing competitive feature within the broader DDS / B-Team framework is the conversion rate from leg engagement to seatbelt — the leg entanglement is treated as a back-take entry mechanism rather than as a terminal position. He competes at the lighter weight classes (–66kg / –77kg range) where the entry-to-back-take pattern produces a higher rate of finishes than heel-hook-only systems do at those weights.

CJI 2 (2025) — competitor at –66kg in the Craig Jones Invitational team format. The CJI format’s pit structure and engagement-incentive ruleset produced a competitive context aligned with his entry-density game.

WNO appearances across the 2020–2025 cycle, including title-fight performances at the lighter weight classes against established submission-only roster names.

Polaris and Submission Underground appearances — submission-only formats in which his back-attack-through-leg-entry pattern is most directly readable.

Founding B-Team Jiu-Jitsu member (2021) alongside Craig Jones, Nicky Ryan, and Nick Rodriguez — part of the cohort that relocated from the Renzo Gracie Academy to Austin after the late-2021 split.

Leg entanglement entry as a back-take mechanism. The architectural feature of Crelinsten’s game is that the leg entanglement is, primarily, an entry to back exposure rather than to a heel hook finish. The mechanical sequence runs from a level change into a leg entry — typically through a saddle or cross-ashi destination governed by inside space control — to a transition that converts the defender’s escape attempt into a turtle, four-point, or rear body lock exposure. The same inside-position connection that produces the leg entanglement also produces back exposure when the defender’s escape rotates them in the opposite direction; hip access applies at the leg entry, and connection precedes control governs the back-exposure transition. See cross-ashi.

INV-LE01InvariantInside Space Control Determines the Entanglement

"Inside space control — maintaining the attacker's hip in the space between their hip and the opponent's hip — prevents the opponent from extracting their leg and determines which submissions are available."

See full invariant page → INV-ST02InvariantHip Access Is the Functional Goal of All Single-Leg Attacks

"Hip access is the functional goal of all single-leg attacks."

See full invariant page → INV-07InvariantConnection Is the Prerequisite for All Control