Jeffrey Cobb

Also Known As: Mr. Athletic, Monster Matanza Cueto, Jeff Cobb, El Jéfe Cobbo, Matanza Cueto, Matanza, X, JC Mateo

Biography: Jeffrey Cobb is an American professional wrestler and former amateur wrestler. As of May 2025, he is signed to WWE, where he performs on the SmackDown brand under the ring name JC Mateo. He is best known for his tenure in New Japan Pro-Wrestling (NJPW), where he was a member of United Empire. In NJPW, he is a former one-time NEVER Openweight Champion and a three-time IWGP Tag Team Champion. He also wrestled for various promotions, such as Lucha Underground (as the masked wrestler Matanza Cueto) where he is a former one-time Lucha Underground Champion, Ring of Honor (ROH), where he is a former one-time ROH Television Champion, as well as Pro Wrestling Guerrilla (PWG) where he is a former one-time PWG World Champion, one-time World Tag Team Champion, and is also the winner of the 2018 Battle of Los Angeles. As an amateur wrestler, Cobb represented Guam at the 2004 Summer Olympics, where he became the nation's flag bearer in the opening ceremony and competed in the men's light heavyweight freestyle category. He transitioned to professional wrestling in 2009.

Department: Acting

Place of Birth: Honolulu, Hawaii, U.S

Adult: No

Birthday: July 11, 1982

Age: 42 years old

Gender: Male

Popularity:

1.79%

Known For:

NJPW Wrestle Grand Slam in MetLife Dome: Night 2
NJPW G1 Climax 31: Day 2
NJPW G1 Climax 31: Day 4
NJPW G1 Climax 31: Day 6
NJPW G1 Climax 31: Day 8
NJPW G1 Climax 31: Day 10
NJPW G1 Climax 31: Day 14
NJPW G1 Climax 31: Day 12
NJPW G1 Climax 31: Day 16
NJPW G1 Climax 31: Day 18
NJPW G1 Climax 31: Day 19 (Final)
GCW Josh Barnett's Bloodsport 9
ROH: Supercard of Honor 2023: Zero Hour
IMPACT Wrestling x NJPW: Multiverse United: Only The Strong Survive
NJPW Dominion 6.6 in Osaka-jo Hall
Mark Hitchcock Memorial Wrestlecon Supershow 2023
NJPW Wrestle Kingdom 16: Night 2
NJPW Wrestle Kingdom 16: Night 1
NJPW: Battle In The Valley
NJPW Dominion 6.4 in Osaka-jo Hall
NJPW Sakura Genesis 2023
NJPW G1 Climax 32: Day 1
AAW Unstoppable 2016
NJPW G1 Climax 33: Day 4
NJPW G1 Climax 33: Day 6
NJPW G1 Climax 33: Day 8
NJPW G1 Climax 33: Day 10
NJPW G1 Climax 33: Day 2
NJPW G1 Climax 33: Day 12
NJPW G1 Climax 33: Day 16
NJPW G1 Climax 32: Day 2
NJPW G1 Climax 33: Day 14
NJPW G1 Climax 33: Day 13
NJPW G1 Climax 32: Day 3
NJPW G1 Climax 32: Day 4
NJPW G1 Climax 33: Day 15
NJPW Windy City Riot
NJPW 51st Anniversary Event & New Japan Cup 2023: Day 2
NJPW New Japan Cup 2023: Day 3
NJPW G1 Climax 32: Day 5
NJPW New Japan Cup 2023: Day 4
NJPW Wrestling Dontaku
NJPW G1 Climax 33: Day 18
NJPW G1 Climax 33: Day 17
NJPW G1 Climax 33: Day 19 (Final)
NJPW Capital Collision 2022
NJPW Dominion 6.12 In Osaka-Jo Hall
AEW x NJPW Presents Forbidden Door
ROH: Saturday Night At Center Stage
NJPW Battle in the Valley
Warrior Wrestling 2
NJPW The New Beginning in Osaka 2024
NJPW x STARDOM: Historic X-Over
ROH: Honor For All
ROH: Final Battle
ROH: Final Battle - Zero Hour
NJPW The New Beginning In Sapporo 2024 - Night 1
NJPW Wrestle Kingdom 17 Pre-Show
NJPW Sakura Genesis 2024
NJPW New Year Dash!! 2024
NJPW Wrestling Dontaku 2024 - Night 1
NJPW Wrestling Dontaku 2024 - Night 2
NJPW Resurgence 2024
NJPW The New Beginning In Sapporo 2024 - Night 2
NJPW G1 Climax 32: Day 6
NJPW G1 Climax 32: Day 7
NJPW G1 Climax 32: Day 8
NJPW G1 Climax 32: Day 9
NJPW G1 Climax 32: Day 11
NJPW G1 Climax 32: Day 12
NJPW G1 Climax 32: Day 10
NJPW G1 Climax 32: Day 14
NJPW G1 Climax 32: Day 13
NJPW Battle Autumn 2022 - Night 16
NJPW G1 Climax 32: Day 20 (Final)
NJPW G1 Climax 32: Day 16
NJPW G1 Climax 32: Day 15
NJPW G1 Climax 32: Day 17
NJPW G1 Climax 30: Day 19 (Final)
NJPW New Year Dash !! 2023
NJPW Wrestle Grand Slam In Tokyo Dome
RevPro: Uprising 2016
NJPW Dominion 6.9 In Osaka-Jo Hall ~ Best Of The Super Junior 31 Final ~
PWG: Prince
NJPW Power Struggle ~ Super Junior Tag League 2023
NJPW Declaration Of Power
NJPW G1 Climax 34: Day 1
NJPW Wrestle Kingdom 13
AEW x NJPW Present Forbidden Door: Zero Hour
AEW x NJPW Present Forbidden Door
NJPW The New Beginning in Nagoya
RevPro: High Stakes 2020
NJPW New Japan Soul 2024: Day 2
NJPW New Japan Soul 2024: Day 1
NJPW G1 Climax 34: Day 3
NJPW G1 Climax 34: Day 5
NJPW G1 Climax 34: Day 4
NJPW G1 Climax 34: Day 7
NJPW G1 Climax 34: Day 9
NJPW G1 Climax 34: Day 6
NJPW G1 Climax 34: Day 10
NJPW G1 Climax 34: Day 8
NJPW G1 Climax 34: Day 12
NJPW G1 Climax 34: Day 13
NJPW G1 Climax 34: Day 15
NJPW G1 Climax 34: Day 11
NJPW G1 Climax 34: Day 16
NJPW G1 Climax 34: Day 14
NJPW New Japan Soul 2024: Day 4
NJPW New Japan Soul 2024: Day 3
NJPW New Japan Soul 2024: Day 5
NJPW 52nd Anniversary Event & New Japan Cup 2024: Day 1
NJPW New Japan Cup 2024 • Day 2
PWG: 2016 Battle of Los Angeles - Stage One
PWG: Smokey And The Bandido
NJPW G1 Climax 34: Day 17
NJPW G1 Climax 34: Day 18
NJPW Shingo Takagi's 20th Debut Anniversary Event
NJPW G1 Climax 34: Day 19 (Final)
NJPW Destruction In Ryogoku 2023
NJPW Destruction In Kobe 2023
PWG: Game Over, Man
PWG: Only Kings Understand Each Other
PWG: Mystery Vortex IV
Pancakes & Piledrivers II: The Indy Summit
DEFY1 Legacy
PROGRESS Chapter 67: Bourbon Is Also A Biscuit
DEFY2 Wolves At The Door
DEFY6 The Crash Lucha Libre
DEFY8 Kings Among Men
DEFY Vs. ECCW 2017
Bar Wrestling 6: Head Of Household
Bar Wrestling 9: February Stars
Bar Wrestling 3: Bar Of Hardcore
ScrapperMania 4
Bar Wrestling 11: April O'Neil
PWG: 2017 Battle of Los Angeles - Stage One
NJPW G1 Special In San Francisco
PWG: Time Is A Flat Circle
PWG: Mystery Vortex V
PWG: Man On The Silver Mountain
PWG: All Star Weekend 14 - Night One
PWG: THIRTEEN
PWG: Head Like A Cole
PWG: Nice Boys (Don't Play Rock and Roll)
PWG: All Star Weekend 13 - Night One
PWG: 2017 Battle of Los Angeles - Stage Two
PWG: 2017 Battle of Los Angeles - Final Stage
Wrestlecon Supershow 2018
NJPW Fighting Spirit Unleashed
ROH: Final Battle 2018
ROH: Honor Reigns Supreme
ROH & NJPW: Global Wars - Lewiston
Bar Wrestling
Bar Wrestling 8: Happily Ever After
NJPW New Year Dash !! 2019
ROH: Best In The World
NJPW G1 Climax 29: Day 5
NJPW G1 Climax 29: Day 7
NJPW G1 Climax 29: Day 6
NJPW G1 Climax 29: Day 4
NJPW G1 Climax 29: Day 1
NJPW G1 Climax 29: Day 3
NJPW G1 Climax 29: Day 9
NJPW G1 Climax 29: Day 8
NJPW G1 Climax 29: Day 10
NJPW G1 Climax 29: Day 2
NJPW G1 Climax 29: Day 11
NJPW G1 Climax 29: Day 14
NJPW G1 Climax 29: Day 13
NJPW G1 Climax 29: Day 12
NJPW G1 Climax 29: Day 15
NJPW G1 Climax 29: Day 19 (Final)
NJPW G1 Climax 29: Day 17
NJPW G1 Climax 29: Day 18
NJPW G1 Climax 29: Day 16
EVOLVE 78
CEOxNJPW When Worlds Collide
PWG: 2018 Battle of Los Angeles - Stage Two
PWG: 2018 Battle of Los Angeles - Stage Three
WrestleCon SuperShow 2017
ROH: Death Before Dishonor XVII
NJPW Wrestling Dontaku 2019 - Night 1
NJPW G1 Climax 30: Day 9
NJPW G1 Climax 30: Day 7
NJPW G1 Climax 30: Day 3
NJPW G1 Climax 30: Day 1
NJPW G1 Climax 30: Day 5
NJPW G1 Climax 30: Day 17
NJPW G1 Climax 30: Day 11
NJPW G1 Climax 30: Day 13
NJPW G1 Climax 30: Day 15
AAA TripleMania XXIV
NJPW Wrestle Kingdom 15: Night 2
ROH & NJPW: G1 Supercard
AAW Showdown 2018
IMPACT Wrestling vs. Lucha Underground 2018
ROH: 17th Anniversary
ROH: Bound By Honor
ROH: Final Battle 2019
ROH: Unauthorized
NJPW New Year Dash !! 2021
PWG: Mystery Vortex VI
NJPW Castle Attack 2021 - Night 2
NJPW Castle Attack 2021 - Night 1
NJPW Sakura Genesis 2021
ECCW 23rd Anniversary Show
Sorry You're Watching This: Jeff Cobb & Brody King
NJPW Wrestle Grand Slam in MetLife Dome: Night 1
NJPW Road to Destruction 2024: Day 2
NJPW Road to Destruction 2024: Day 3
NJPW Road to Destruction 2024: Day 4
NJPW Road to Destruction 2024: Day 5
NJPW Destruction In Kobe 2024
NJPW: King Of Pro Wrestling 2024
NJPW Power Struggle ~ Super Junior Tag League 2024
NJPW Wrestle Kingdom 19
NJPW x STARDOM: Historic X-Over II
GCW Josh Barnett's Bloodsport 4
NJPW x AEW x CMLL x ROH x STARDOM: Wrestle Dynasty
NJPW New Year Dash!! 2025
NJPW Battle in the Valley
GCW Josh Barnett’s Bloodsport 5
NJPW Sakura Genesis 2025
NJPW New Japan Cup 2025 - Final
WWE Backlash 2025