|WWE No Mercy|
|Brand(s)||Raw (2002; 2007–2008, 2017)|
SmackDown (2002–2008, 2016)
|First event||1999 (UK)|
WWE No Mercy was a professional wrestling pay-per-view (PPV) event that was produced by WWE, a professional wrestling promotion based in Connecticut. The first No Mercy was held on May 16, 1999 in Manchester, England, and was the only No Mercy event produced in the United Kingdom. A second No Mercy was then held in October that year in Cleveland, Ohio, United States. Beginning with this second event, No Mercy became the annual October PPV until 2008. The event was then discontinued and replaced by Hell in a Cell in 2009. After eight years, No Mercy was reinstated in October 2016. However, No Mercy was again discontinued after the September 2017 event, as WWE reduced the amount of yearly PPVs held after they had ended the production of brand-exclusive PPVs following WrestleMania 34 in 2018. In addition to traditional PPV, the 2016 and 2017 events aired on the WWE Network.
The first four events were held when the promotion was still called the World Wrestling Federation (WWF). In May 2002, the promotion was renamed to World Wrestling Entertainment (WWE), and in 2011, the "WWE" name became an orphaned initialism for the promotion. During the first brand extension, No Mercy was held exclusively for the SmackDown brand from 2003 to 2006. When the event was reinstated for the second brand extension in 2016, it was again SmackDown-exclusive and was then Raw-exclusive for the final event in 2017.
On May 16, 1999, the then-World Wrestling Federation (WWF) held a pay-per-view (PPV) in the United Kingdom, specifically Manchester, England, titled No Mercy. The pay-per-view market was relatively new to Britain at the time: before One Night Only in 1997, all pay-per-view events were broadcast for free on Sky Sports. The UK-exclusive pay-per-views were established to serve as promotion for the new delivery method, however, were booked and treated similar to house shows. This fiirst event would be the only No Mercy event produced in the United Kingdom, as the WWF held a second No Mercy later that same year on October 17, but in Cleveland, Ohio, United States. No Mercy continued as the annual October PPV for the promotion (with the May UK PPV renamed Insurrextion, held until 2003) until 2008. The event was then discontinued and replaced by Hell in a Cell in 2009, which became the annual October PPV.
In March 2002, the WWF introduced the brand extension, where the promotion divided its main roster into two brands, Raw and SmackDown!, where the wrestlers exclusively performed—in May 2002, the WWF was renamed to World Wrestling Entertainment (WWE). The 2002 event, which was the first to be held under the WWE name, featured wrestlers from both the Raw and SmackDown! brands, but from 2003 to 2006, the PPV was produced exclusively for wrestlers from the SmackDown! brand. Following WrestleMania 23 in 2007, WWE discontinued brand-exclusive PPVs, thus the 2007 and 2008 events featured wrestlers from the Raw, SmackDown, and ECW brands—ECW was established as a third brand in 2006.
In February 2010, the ECW brand was disbanded. In April 2011, the promotion ceased using its full name, with the "WWE" name becoming an orphaned initialism for the promotion, and in August that year, the first brand extension ended. In July 2016, WWE reintroduced the brand extension, again dividing the roster between the Raw and SmackDown brands. No Mercy was reinstated that year for October and was again produced exclusively for SmackDown. The following year, it was moved up to September and produced exclusively for Raw. This 2017 event would be the final No Mercy event held, as following WrestleMania 34 in 2018, WWE again discontinued brand-exclusive PPVs, resulting in WWE reducing the amount of yearly PPVs produced.
Out of the 13 No Mercy PPV events produced, the WWE Championship was defended in the main event eight times (the first four of which were as the WWF Championship), and nine times if including the 2016 event in which the advertised main event opened the show due to timing conflicts with the second United States presidential debate; due to this, the 2016 event was the only No Mercy in which the final match was a non-title match. The now-defunct World Heavyweight Championship was defended in the main event match three times. The WWE Universal Championship, which was introduced in 2016, was only defended in the main event once.
Jim Johnston, who was a long-time music composer for the promotion, wrote a song titled "No Mercy", which was used as a regular theme song for the events in 2002, 2004, 2006, and 2007. For the 2016 and 2017 events, the theme song was by KIT and was also titled "No Mercy."
|Raw-branded event||SmackDown-branded event|
|1||No Mercy (UK)||May 16, 1999||Manchester, England||Manchester Evening News Arena||Stone Cold Steve Austin (c) vs. The Undertaker vs. Triple H in an Anything Goes Triple Threat match for the WWF Championship|||
|2||No Mercy (1999)||October 17, 1999||Cleveland, Ohio||Gund Arena||Triple H (c) vs. Stone Cold Steve Austin in an Anything Goes match for the WWF Championship|||
|3||No Mercy (2000)||October 22, 2000||Albany, New York||Pepsi Arena||The Rock (c) vs. Kurt Angle in a No Disqualification match for the WWF Championship|||
|4||No Mercy (2001)||October 21, 2001||St. Louis, Missouri||Savvis Center||Stone Cold Steve Austin (c) vs. Kurt Angle vs. Rob Van Dam in a Triple Threat match for the WWF Championship|||
|5||No Mercy (2002)||October 20, 2002||North Little Rock, Arkansas||Alltel Arena||Brock Lesnar (c) vs. The Undertaker in a Hell in a Cell match for the WWE Championship|||
|6||No Mercy (2003)||October 19, 2003||Baltimore, Maryland||1st Mariner Arena||Brock Lesnar (c) vs. The Undertaker in a Biker Chain match for the WWE Championship|||
|7||No Mercy (2004)||October 3, 2004||East Rutherford, New Jersey||Continental Airlines Arena||John "Bradshaw" Layfield (c) vs. The Undertaker in a Last Ride match for the WWE Championship|||
|8||No Mercy (2005)||October 9, 2005||Houston, Texas||Toyota Center||Batista (c) vs. Eddie Guerrero for the World Heavyweight Championship|||
|9||No Mercy (2006)||October 8, 2006||Raleigh, North Carolina||RBC Center||King Booker (c) vs. Bobby Lashley vs. Batista vs. Finlay in a Fatal four-way match for the World Heavyweight Championship|||
|10||No Mercy (2007)||October 7, 2007||Rosemont, Illinois||Allstate Arena||Triple H (c) vs. Randy Orton in a Last Man Standing match for the WWE Championship|||
|11||No Mercy (2008)||October 5, 2008||Portland, Oregon||Rose Garden||Chris Jericho (c) vs. Shawn Michaels in a Ladder match for the World Heavyweight Championship|||
|12||No Mercy (2016)||October 9, 2016||Sacramento, California||Golden 1 Center||Bray Wyatt vs. Randy Orton[a]|||
|13||No Mercy (2017)||September 24, 2017||Los Angeles, California||Staples Center||Brock Lesnar (c) vs. Braun Strowman for the WWE Universal Championship|||
(c) – refers to the champion(s) heading into the match