Cassio Werneck
Brazilian mixed martial artist

Cássio Werneck (born 17 February 1974) is a Brazilian Jiu-Jitsu competitor, instructor and owner of Cassio Werneck Brazilian Jiu-Jitsu located in Sacramento, California.
Early years
Werneck began training in martial arts at 11 years old, practicing Capoeira for 4 years. He switched to grappling in 1991, moving to a Judo club where he was coached by sensei Miura. Cassio was exposed to more of the self-defence aspect of jiu-jitsu through Professor Sardella, a member of the Federal Police. In 1993, Werneck's focus turned to Brazilian Jiu-jitsu.
Grappling career
Werneck fought in the Southern California Pro-Am Invitational 2003, where he beat Jeff Newton in the opening round before losing to Rener Gracie in the quarter-final. The match with Gracie drew attention due to a controversial finish, where Werneck claimed that he did not tap.
Werneck competed at the IBJJF Master World Championship on September 2, 2023, where he won the master 4 middleweight division.
Teaching career
Athletes such as Randy Couture, Frank Mir, Dan Henderson and Urijah Faber have also trained under Cassio at his Sacramento location.
Cassio has conducted seminars in the Middle East as well as in the U.S. and Brazil.
This brief starts where responsible research should: with the source description of “Cassio Werneck” as brazilian mixed martial artist. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the people & ideas register because the source frames it as brazilian mixed martial artist. Its deeper value depends on whether names, dates, institutions and citations support that framing.
The entry’s evidential value lies in the named roles, institutions and publications that can be tested against primary documentation. The source revision retrieved here is dated Dec 15, 2024. The linked authority identifier is Q5049453. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1974, 1991, 1993 and 2003.
Public reputation and documentary evidence do not always develop together; absence from a summary is not evidence of historical absence. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Read biographical claims against dates, named institutions and the cited references. Distinguish a subject’s later reputation from evidence produced during their lifetime.
- Establishing names and roles
- Building a first chronology
- Locating cited institutions
Personal papers, civil or court records, institutional files and the scholarship cited by the source.
Three-step research path
- Establish the record: confirm the title “Cassio Werneck”, its source revision and the description used here.
- Expand the search: follow Cassio Werneck primary sources, Cassio Werneck archive and Cassio research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Cassio Werneck”?
- Which claims depend on a single source or contested interpretation?
- Which primary records establish identity, chronology and institutional ties?
Search terms from this dossier
This entry incorporates text from “Cassio Werneck” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.