- Birth name - Jeffrey Cobb
- Born - July 11, 1982, Honolulu, Hawaii, United States
- Ring name(s) - El Jéfe Cobbo, Jeff Cobb, Matanza, Matanza Cueto, Matanza Duran, X
- Billed height - 5 ft 10 in (1.78 m)
- Billed weight - 263 lb (119 kg)
- Billed from - Honolulu, Hawaii
- Trained by - Oliver John, Sabaki
- Debut - April 6, 2009
- Major Companies - Lucha Underground (2015–2019), Pro Wrestling Guerrilla (2016–2019), Progress Wrestling (2017–2018), New Japan Pro Wrestling (2017-present), Ring of Honor (2018–2020)
- Select Championship History
- AAW Professional Wrestling Tag Team Championship
- Action Zone Wrestling Heavyweight Championship
- All Pro Wrestling Universal Heavyweight Championship
- Big Time Wrestling Tag Team Championships
- Cape Championship Wrestling Tag Team Championship
- Fighting Spirit Pro Championship
- Lucha Underground Championship
- New Japan Pro Wrestling - IWGP Tag Team Championship
- New Japan Pro Wrestling - NEVER Openweight Championship
- Premier Wrestling Heavyweight Championship
- Pro Wrestling Guerrilla World Championship
- Pro Wrestling Guerrilla World Tag Team Championship
- Ring of Honor World Television Championship
- Ring Warriors Grand Championship
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Jeff Cobb
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