roster in April 2005 under the ring name Johnny Nitro; winning the WWE Tag Team Championship with Joey Mercury in his first match on the show.

[32] In their debut match on the main roster, MNM won the WWE Tag Team Championship from Eddie Guerrero and Rey Mysterio on the April 21 episode of SmackDown!.

[33] MNM held the titles for three months, having successful defenses against the teams of Guerrero and Mysterio,[34] and Charlie Haas and Hardcore Holly on May 22 at Judgment Day,[35] before dropping them to the Legion of Doom on July 24 at The Great American Bash.

in a four-way match defeating Legion of Doom, The Mexicools, and William Regal and Paul Burchill,[37] but lost them to Rey Mysterio and Batista on the December 16 episode of SmackDown!

[43] Nitro was immediately placed in the Intercontinental Championship picture, and at Vengeance on June 25, he defeated champion Shelton Benjamin in a triple threat match also involving Carlito to win the title.

[47] Also around this time, Nitro entered into a partnership with rapper Kevin Federline, with the duo antagonizing and beginning a rivalry with WWE Champion John Cena.

[70][71][72] Though rivals, Morrison and The Miz faced the dysfunctional tag team of Matt Hardy and Montel Vontavious Porter (MVP) on the November 16 episode of SmackDown!

[79] Afterwards, they started a feud with Cryme Tyme (JTG and Shad) through each team's Internet show, which then transitioned to matches on Raw and on October 26 at Cyber Sunday.

[107] Morrison then went on to participate in the main event of SummerSlam on August 15, in which he and six teammates (John Cena, Edge, Chris Jericho, Bret Hart, R-Truth, and Daniel Bryan) were victorious in a seven-on-seven elimination tag team match against The Nexus.

[109] Morrison entered the 2010 edition of the King of the Ring tournament, defeating Tyson Kidd, Cody Rhodes, and Alberto Del Rio but lost to Sheamus in the final round.

[116][117] At WrestleMania XXVII on April 3, Morrison, Trish Stratus and Jersey Shore guest star Snooki defeated Dolph Ziggler and LayCool (Layla and Michelle McCool) in a mixed tag team match.

[130] On the November 7 episode of Raw SuperShow, Morrison picked up his first victory in three months, defeating United States Champion Dolph Ziggler in a non-title match.

On August 12, 2012, Hennigan appeared at Juggalo Championship Wrestling's Bloodymania 6 event, defeating Matt Hardy and Breyer Wellington in a three-way match.

[149] In September 2014, it was reported that Hennigan had signed with the El Rey network's new television series, Lucha Underground,[150] where he wrestled under the ring name Johnny Mundo.

[7] Mundo wrestled in the main event of the debut episode of Lucha Underground on October 29, 2014, defeating Prince Puma and winning one hundred thousand dollars, which was then taken away from him by promoter Dario Cueto, setting up several feuds.

[152] Mundo then defeated Prince Puma and Big Ryck in the main event of the December 10, 2014 episode, which was a three-way ladder match, to finally win the hundred thousand dollars he was denied in the Lucha Underground debut.

[159][160] Worldwide Underground lost their titles to Aero Star, Drago and Fénix at the third and final part Ultima Lucha Dos, which aired on July 20.

[168] On October 4, at Héroes Inmortales IX, Mundo unsuccessfully challenged El Patrón Alberto for the AAA Mega Championship, when he was defeated by disqualification.

[187] As the PPV moved closer, the feud started to blur the lines between a work (something scripted) and shoot (something real), beginning with the two wrestlers trading insults on Twitter that they appeared to take personal, with Aries later deleting many of his tweets.

[203][204][205] He made his return on January 3, 2020 episode of SmackDown under his John Morrison ring name and resumed his partnership with The Miz, thus re-establishing him as a heel for the first time in WWE since 2009.

[215] On the first night of WrestleMania 36 on April 4, after The Miz's absence due to illness,[216] Morrison defended the SmackDown Tag Team Championships by himself in a ladder match against Kofi Kingston and Jimmy Uso, in which he was successful.

[218] At Money in the Bank on May 10, Morrison and The Miz unsuccessfully attempted to regain the championship in a fatal four-way tag team match also involving Lucha House Party (Gran Metalik and Lince Dorado) and The Forgotten Sons (Steve Cutler and Wesley Blake).

On the December 7 episode of Raw, Morrison ended a nearly seven-month losing streak after defeating Drew McIntyre and Sheamus in a 3-on-2 handicap match alongside The Miz and AJ Styles.

[235] After The Miz suffered an injury at WrestleMania Backlash on May 16, Morrison would embark on a singles run, starting by defeating Jeff Hardy on the June 14 episode of Raw.

[256] On the June 23, 2023 episode of Rampage, under the new ring name "Johnny TV", Hennigan returned to AEW as the newest member of Q. T. Marshall's stable QTV after attacking Billy Gunn.

At Final Battle on December 15, TV interfered in the Survival of the Fittest match for the vacant ROH World Television Championship by attacking Dalton Castle.

[264] On January 7, 2023, Hennigan returned to Major League Wrestling at their Blood and Thunder pay-per-view under the ring name Johnny Fusion and defeated Davey Richards to win their National Openweight Championship.

[274]Alongside his team MNM, Hennigan debuted on WWE television as Johnny Nitro, presenting himself as an arrogant wrestler with "elite Hollywood status".

[290] On October 31, 2022, Hennigan announced the release of his directorial debut, a comedy horror short film titled The Iron Sheik Massacre which he also produced and co-wrote with his wife Kira Forster.

[300] He was accompanied to the ring by fellow WWE wrestlers including LA Knight, Karrion Kross, Scarlett, Mojo Rawley and "Hacksaw" Jim Duggan.