Efrén Tiburcio Márquez made his professional wrestling debut on November 11, 1990, working under the
Ring name Chamaco Audaz (the Audacious Kid).
Consejo Mundial de Lucha Libre (1995–2007) In the early 1990s, Mr. Niebla began working for Mexico's largest
professional wrestling promotion,
Consejo Mundial de Lucha Libre (CMLL). He initially worked for one of the local CMLL-affiliates, winning both the Distrito Federal Welterweight Championship and Distrito Federal Tag Team Championship once. In 1997, Mr. Niebla formed a trio with fellow
good guys (called
técnicos in Lucha Libre)
Lizmark and
Atlantis called
La Ola Azul (the Blue Wave). On April 29,
La Ola Azul defeated
El Satánico, Emilio Charles Jr. and Rey Bucanero to win the
CMLL World Trios Championship, Mr. Niebla's first major title victory. On March 30, 2001, Mr. Niebla teamed up with
Olímpico and
Safari to defeat Blue Panther,
Fuerza Guerrera and
El Signo for the
Mexican National Trios Championship. The match against Wagner, Universo and Black Tiger III was part of a longer storyline between Mr. Niebla and Universo 2000; the two had met in 2002 over Universo 2000's
CMLL World Heavyweight Championship, but at the time Universo 2000 retained the title. On April 18, 2003, Mr. Niebla defeated Universo 2000 to become the CMLL World Heavyweight Champion.
Asistencia Asesoría y Administración (2007–2008) In late 2007, Mr. Niebla left CMLL to work for their main rival,
Asistencia Asesoría y Administración (AAA). He debuted as one of
Los Vipers, a long-existing faction of
villains (known as
rudos in Lucha Libre), and soon began challenging Los Vipers' leader
Abismo Negro for the leadership role. In early 2008, the storyline saw the two physically fight over the leadership in matches where the job was on the line. Each time Abismo Negro won, AAA head booker Joaquín Roldan announced that the decision and Negro, the winner, did not lead Los Vipers. After the second match, the rest of Los Vipers turned on Abismo Negro and ejected him from the group. The storyline was supposed to end in a
Luchas de Apuestas match between Niebla and Negro at
Triplemanía XVI. Later on, the match was changed to a multi-man
steel cage match including all of Los Vipers (Mr. Niebla, Black Abyss, Psicosis II and Histeria) and Abismo Negro, with the last person in the cage being forced to unmask. A few days before the match, AAA cancelled it due to Negro sustaining a neck injury. On the night of Triplemanía XVI, Mr. Niebla quit AAA, opting to return to CMLL instead. Mr. Niebla subsequently stated he left AAA, because a major mask vs. mask match he was promised fell through when Negro was unable to work the Triplemanía match, and that he came back to CMLL looking to make his mark unmasking a "big name" such as
Místico or Dr. Wagner Jr. He also apologized to AAA if they were unhappy with the method he used, but he believed he handled everything in a professional manner and that he was upfront about his ambitions for a "big name" mask-versus-mask match. On September 2,
El Felino turned
rudo and joined
La Peste Negra. After Felino joined the group, Heavy Metal, not comfortable with working their comedic style, was quietly phased out. Mr. Niebla did not work any matches for three months, starting in March 2010. In early June, CMLL announced that after recuperating in Europe, Mr. Niebla was ready to return to the ring, reuniting
La Peste Negra for the first time in several months. After making only a few in-ring appearances, Mr. Niebla disappeared from the CMLL booking sheets once again, being replaced by Rey Bucanero. It was later revealed that his body had rejected the implant he had been given during his previous time away from the ring, and it had to be replaced, putting him out of action for approximately a month before he was able to wrestle again. On August 16, it was announced that the returning Mr. Niebla would be one of 14 men putting their mask on the line in a
Luchas de Apuestas steel cage match in the main event of the
CMLL 77th Anniversary Show. Mr. Niebla was the sixth man to leave the steel cage, keeping his mask safe. The match came down to
La Sombra pinning
Olímpico to unmask him. On July 29, 2011, Mr. Niebla defeated 15 other men to win the
2011 Leyenda de Azul. At the 2012
Homenaje a Dos Leyendas, Mr. Niebla and Atlantis defeated
Rush and
El Terrible to win the
Torneo Nacional de Parejas Increíbles tournament, where rivals teamed together. In late 2012, the long-dormant rivalry between Mr. Niebla and his former tag team partner Shocker was resumed as the two began to work on opposite sides of a number of matches. The two were paired up for the 2013
Torneo Nacional de Parejas Increíbles as a way to continue the storyline between the two. The team worked together without much problems in the initial rounds as they defeated the team of
Marco Corleone and
Kraneo and then
Máscara Dorada and Mephisto to qualify for the semi-finals, where they lost to eventual tournament winners La Sombra and
Volador Jr. Following the loss, Mr. Niebla and Shocker argued and almost came to blows over who was responsible for losing the match. In January 2014, Niebla introduced new
Peste Negra members
Bárbaro Cavernario and
Herodes Jr. On February 14, Niebla and Cavernario defeated
Soberano Jr. and Volador Jr. in the finals to win the
2014 Torneo Gran Alternativa. On February 18, Niebla, El Felino and Negro Casas defeated
La Máscara, Rush and
Titán to win the Mexican National Trios Championship. In January 2015, Niebla made his
New Japan Pro-Wrestling (NJPW) debut, working the
Fantastica Mania 2015 tour co-produced by CMLL and NJPW. However, Mr. Niebla did not wrestle on the last two stops of the tour. According to the
Wrestling Observer Newsletter, Niebla disappeared on the third night and was found passed out in his hotel room the following morning, after which he was rushed to a local hospital for the next three days. NJPW, reportedly furious at the event, made CMLL pay for the hospital bill, causing the promotion to fire Niebla after his return to Mexico. CMLL confirmed Niebla's departure from the promotion in February 2015, after which he continued to wrestle for various independent promotions. Niebla returned to CMLL on April 5, 2015, after his suspension, teaming with El Felino and Negro Casas to defeat
Máximo,
Titán and Volador Jr.
La Peste Negra participated in the
CMLL 82nd Anniversary Show, losing to
Dragon Lee,
Místico and
Valiente. Mr. Niebla was paired up with rookie Warrior Steel for the 2016
Gran Alternativa tournament, losing in the first round to Rush and
Golden Magic. In the first half of 2016, Mr. Niebla was programmed with Volador Jr. in a feud that saw the two team up for the 2016
Torneo Nacional de Parejas Increíbles tournament. The two defeated
Blue Panther and
Ephesto in the first round and
Bobby Z and
Máscara Dorada in the second round, before they lost to
Mephisto and Místico in the semi-finals. When the CMLL World Heavyweight Championship was vacated in mid-2017, Mr. Niebla entered a
torneo cibernetico elimination match for the title, but was eliminated by eventual winner
Marco Corleone. In early 2018 CMLL revisited the previously aborted storyline between Mr. Niebla and Atlantis as they teamed up for the 2018
Parejas Increíbles tournament. The duo defeated
Ángel de Oro and
El Cuatrero in the first round, but were defeated by Rush and
El Terrible in the second round. Mr. Niebla was suspended by CMLL after working a match in August he was clearly not in any condition to wrestle in, ==Personal life==