Analytics preferences

Allow privacy-masked PostHog analytics and session replay so we can see which parts of the reference are useful and where people get stuck. We never send searches, route identifiers, or form contents. Vercel's anonymous traffic and performance measurement remains active either way.

jiu-jitsu reference

Athletes Events Organizations Matches Knowledge Graph About Support

jiu-jitsu reference

© 2026 Jiu Jitsu Reference. All rights reserved.

Apple, the Apple logo, and App Store are trademarks of Apple Inc., registered in the U.S. and other countries.

Privacy Terms Support

JM Holland vs Spencer Mumme ("Failhart") | Jiu-Jitsu Reference

Matches/Mar 8, 2020

JM Holland vs Spencer Mumme ("Failhart")

Combat Jiu-Jitsu Worlds: The Featherweights

versus

WinnerSpencer Mumme ("Failhart")“Failhart”

Match result

SubmissionHeel Hook

Winner: Spencer Mumme ("Failhart")
Method: Heel Hook
Stage: Not recorded
Weight class: Featherweight

Event context

Date: March 8, 2020
Location: Los Angeles, USA
Organization: Eddie Bravo Invitational
Division: Featherweight