Mecha Wolf 450

John Jesús Yurnet (born June 21, 1987), better known by his ring name Mecha Wolf 450, is a Puerto Rican professional wrestler and professional wrestling trainer.

He is best known for his work in World Wrestling Council (WWC), where he is a former two-time holder of the WWC Universal Heavyweight Championship.

He has also worked for prominent promotions such as Impact Wrestling, Lucha Libre AAA Worldwide (AAA), Consejo Mundial de Lucha Libre (CMLL), The Crash, and WWE (in their NXT and 205 Live brands).

He currently wrestles for the National Wrestling Alliance where he is a two time World Tag Team Champion.

A fan of heavy metal music, Yurnet adopted the ring name "Hammett" as a homage to Metallica's lead guitarist Kirk Hammett..

Upon completing his training with Johhny Rivera (also known as Invader No. 3 from his days as an active wrestler), He started his career working on the independent circuit of Puerto Rico, in promotions including Xtreme Wrestling Entertainment (XWE) among others.

He later entered the New Wrestling Stars (NWS) in 2005 and was a member of the stable "HP" with Ash, Livewire, and, later on, Stefano.

Hammett became NWS's first Junior Heavyweight Champion after winning a tournament on March 26, 2006 but, after having problems with the company, soon vacated the title and left for the International Wrestling Association (IWA).

During this time Hammett continued wearing the title until the New Wrestling Stars requested it back.

Hammett soon became IWA's Junior Heavyweight Champion just two weeks later in Bayamón, Puerto Rico defeating champion Blitz.

During his time with IWA, Hammet teamed with both Tommy Diablo and Carlitos in tag matches before leaving IWA to return to the NWS.

Where on August 13, 2006 in Aguadilla, Puerto Rico, Hammet made his first appearance after the match between Bolo The Red Bulldog and William De La Vega, running in through the crowd.

Hammet helped out De La Vega, Noriega, and Sabu Kid clear the ring of his former HP teammates.

The appearance was a one-off, however, as Hammett left the company again the next day to enter the World Wrestling Council (WWC).

While in WWC, Hammett feuded with Brent Dail, Alex Montalvo and Eli Rodriguez.

Hammet soon won WWC's Junior Heavyweight title, becoming the first wrestler in Puerto Rican Wrestling to win the triple-crown by winning the junior heavyweight titles of the three main Puerto Rican companies (at that time).

He also had feuds with wrestlers like Rick Stanley, William De La Vega, BJ, Rico Suave and Tim Arson whom he wrestled for the WWC tag team championships.

In his feud with BJ he became the WWC Television Champion on March 1, 2008, and held it for two weeks before dropping it back to BJ.

By September 2008, he decided to leave WWC and joined Windy City Pro Wrestling.

On February 19, 2010, he defeated Steve Boz to win the Lucha Chicago Championship, In 2014, Mr 450 traveled to Japan where he saw action on Michinoku Pro Wrestling and Pro Wrestling Zero1.

After Japan, he went back to the United States to wrestle in Fight The World Wrestling where he won the FTW World Championship.

He later came back to Puerto Rico in October 2014 to World Wrestling League event Inssurection where he faced El Sensacional Carlitos, this match being named The Match Of The Year.

Later that November they faced each other again.

In December 2014, Mr. 450 Hammett wrestled Bull Dempsey as Jesús De León on an episode of NXT.

He returned to WWC on April 4, 2015 to challenge for the Universal World Heavyweight Championship in the main event of Camino a la Gloria, but the match ended without a clear winner and Carlos "Chicano" Cotto retained.

The series between both peaked in a cage match, which Hammet won to become the Universal Heavyweight Champion.

At Aniversario 2015, he defeated Carly Colón to retain.

During his reign as champion, Hammet would wear the belt in his appearances outside of Puerto Rico, carrying it with him in matches throughout the independent circuit of the United States and Canada.

In an interview with WrestleZone, he explained that his intention was to give the title the foreign exposition that it had when Carlos Colón and Dory Funk feuded over it in the NWA territories and that he wanted people to feel "[that] this guy is going over to Japan with the belt and representing the island there. [...] This guy is going to Ecuador and he's representing there."

On October 16, 2015, he debuted in Caution Wrestling Federation (CWF) by successfully defending the Universal Heavyweight Championship against masked luchador Zoom Driver, marking the first time that the title had been on the line in Mexican territory.

On July 22, 2015, he made a second appearance on NXT losing to Baron Corbin in less than 5 seconds.

On August 19, he made another NXT appearance in an eight-man tag team match, teaming with Jesse Sorensen, Aaron Solow and Jonny Vandal losing to Enzo Amore, Colin Cassady and The Hype Bros (Zack Ryder and Mojo Rawley).

On March 5, 2016, he lost the Universal Championship against Carlito.

On August 7, 2016, Mr. 450 defeated Ricochet to win the Wrestling Superstar World Submission Lucha Championship in Chile.

In November 2016, Yurnet debuted the parallel masked character of Mecha-Balam, a cyborg take on Lince Dorado's Balam character that was given a backstory tying both (as a mecha version improved through "dark science") by designer Chris Parks of Pale Horse Lucha.

On his first match since his injury he defeated El León Apollo in WWC, and Chicano the next day.

On April 16, 2017, Yurnet defeated Ray González in a match to crown a new WWC Universal Heavyweight Champion.

Despite heavily promoting a changing of the guard in their television programming, WWC changed the ongoing storyline the following day so that veteran Thunder (Reynaldo Rodríguez) would win the title in a three-way match, reportedly concerned with his schedule.

Yurnet was critical of the last minute decision, which he labeled "WWClogic" and left the promotion in the same card.

Instead, he resumed his international tours with more appearances in The Crash, RONIN, WrestleCircus and the AAW's XI Anniversary.