His real name is unknown, as is often the case with masked wrestlers in Mexico, where their private lives are kept a secret from the wrestling fans.

[3] His first verified match was on April 9, 2008, where Zaius teamed up with Black Star, losing to his brothers who wrestled as the masked characters Máscara Oriental and El Niño de Fuego.

On August 18 at Héroes Inmortales VII, Pentagón entered the 2013 Copa Antonio Peña, but was defeated in the first round by El Hijo del Fantasma.

[28] On December 7, Pentagón Jr. and his new stablemate Joe Líder won the AAA World Tag Team Championship by defeating Los Güeros del Cielo (Angélico and Jack Evans) and Myzteziz and Fénix in a three-way match.

[35] In August 2014, Pentagón was announced as one of five AAA wrestlers to star in Lucha Underground, a new American television series on El Rey.

[42] He cashed in his shot the following day and defeated Prince Puma in a "Loser Must Retire" match to become the new Lucha Underground Champion.

[43] On August 28, 2015, Pentagón Jr. made his debut for Pro Wrestling Guerrilla (PWG) by entering the 2015 Battle of Los Angeles tournament, defeating Drago in his first round match.

[48] On October 20, Penta and Fénix were booked to lose the championship to The Chosen Bros (Jeff Cobb and Matt Riddle), ending their reign at 216 days.

On July 23, 2016, Pentagón Jr. defeated Sami Callihan to win AAW: Professional Wrestling Redefined's Heavyweight Championship.

[51] During a January 21, 2017, show for The Crash Lucha Libre promotion, Pentagón Jr., Daga and Garza Jr. all came to the ring and later confirmed that they had left AAA.

[52] On January 27, Penta, Daga, Garza and Fénix el Rey announced the formation of a new stable in The Crash, named La Rebelión ("The Rebellion").

Following the match, the lights went dark and when they came on Chris Jericho, dressed as Pentagon, attacked Omega before removing his mask to reveal himself.

[66] However, following Alberto El Patron's dismissal from the promotion, Pentagón Jr. and Fénix were announced as his replacement in the main event, this time for the Impact World Championship.

On the May 17 episode of Impact Wrestling, Pentagón Jr. and El Hijo del Fantasma defeated Matt Sydal and Austin Aries.

[70] In the Spring and Summer of 2018, Pentagón Jr entered a feud with Sami Callihan whom he has faced numerous occasions across many promotions both on and off television.

On January 12, 2019, Pentagón and Fénix defeated the Latin American Xchange (LAX) during the TV tapings in Mexico to win the Impact World Tag Team Championship.

On August 2, Pentagon teaming up L.A. Park defeating Psycho Clown and Pagano being his first victory after one year since his departure in January 2017.

On June 29, 2018, Penta El 0M made a surprise appearance during the main event of CMLL's Super Viernes show, attacking Carístico during the match.

Death Triangle were defeated by Mistico, Mascara Dorada and Volador Jr. by disqualification in a six-man tag team match.

During an independent circuit show in Georgia, The Young Bucks came to the ring to offer the Lucha Brothers an All Elite Wrestling (AEW) contract in a confrontation that ended with a verbal agreement and a handshake.

It was subsequently revealed that Pentagon Jr. and Rey Fénix had agreed to a non-exclusive deal with AEW, due to their legal obligations to Lucha Underground.

On the January 5, 2022 episode of Dynamite, Jurassic Express defeated the Lucha Brothers to win their first AEW World Tag Team Championship.

Prior to the match, he was accompanied to the ring by Alex Abrahantes, carried a shovel, donned a black hood with a full black ring attire and debuted the name "Penta Oscuro" (Dark Penta), a callback to his Lucha Underground gimmick "Pentagon Dark".

[78][79] At Revolution's buy-in show, Oscuro and Pac would team with Erick Redbeard in a trios match against the House of Black (now completed with Buddy Matthews), which they lost.

[80][81] On the September 7, 2022 episode of Dynamite, he would win the recently vacated AEW World Trios Championship with Pac and Fénix, defeating Best Friends.

[84][85] The best of seven series culminated on the January 11, 2023 edition of Dynamite where The Elite defeated Death Triangle in a ladder match to become the new trios champions, ending their reign at 126 days.

At Supercard of Honor on March 31, 2023, the Lucha Brothers would defeat Top Flight (Dante and Darius Martin), The Kingdom (Matt Taven and Mike Bennett), Aussie Open (Kyle Fletcher and Mike Davis), and La Facción Ingobernable (Rush and Dralístico) in a "Reach for the Sky" ladder match to win the vacant ROH World Tag Team Championship.

[91] On the July 17 episode of Rampage Pentagon and Fenix defeated Private Party, which would end up being his final appearance in AEW.

[10] He made his official WWE debut on the following week’s episode of Raw under the ring name Penta, defeating Chad Gable.

[2] Pentagón shares a close friendship with San Francisco 49ers tight end George Kittle, whom he regards as his "best friend" in the United States.