The Grand Slam Championship is an accomplishment in professional wrestling. It is a distinction made to a professional wrestler who has won four specific championships or all available championships within a promotion. National promotions that recognize this include World Wrestling Entertainment and Total Nonstop Action Wrestling. Notable Independent promotions include Florida Championship Wrestling. The four titles typically feature three levels of singles championships and a tag team championship. These singles championships include a primary, secondary, and tertiary championship. As a result, a Grand Slam Champion is also inherently a Triple Crown Champion, which consists of only two levels of singles titles (primary and secondary) and a tag team title.
In WWE (formerly the World Wrestling Federation and World Wrestling Entertainment) the term "Grand Slam Champion" was originally used by Shawn Michaels to describe himself upon winning the European Championship on September 20, 1997. Michaels previously held the WWF Championship, Intercontinental Championship, and the Tag Team Championship with Diesel.
In May 2001, the then WWF.com indicated that the Hardcore Championship was an acceptable substitute for the European Championship in the Grand Slam. Kane, who had defeated Triple H for the Intercontinental Championship at Judgment Day on May 20, 2001,〔(【引用サイトリンク】title=Kane's first reign )〕 was acknowledged as a Grand Slam Champion as he had "become the only superstar in World Wrestling Federation history that has held the Intercontinental title as well as the Hardcore, Tag Team and WWF titles".〔(【引用サイトリンク】title=Big Red Grand Slam )〕
In April 2006, Kurt Angle was noted as being a former Grand Slam Champion on WWE.com, having won the WWE, WWE Tag Team, Intercontinental, and European Championship, indicating that WWE considers the WWE Tag Team Championship to be an acceptable substitute for the World Tag Team Championship. In August 2007, WWE.com published an article listing Shawn Michaels' championship reigns that completed the Grand Slam Championship. They included the WWE, World Heavyweight, World Tag Team, Intercontinental, and European Championship. The inclusion of the World Heavyweight Championship indicated that WWE considered the title to be an acceptable substitute for the WWE Championship in completing the Grand Slam.〔
At ECW One Night Stand in 2006, Rob Van Dam became the first superstar acquired by WWE after the purchase of World Championship Wrestling and Extreme Championship Wrestling in 2001 to complete the Grand Slam when he defeated John Cena for the WWE Championship. Booker T became the second star acquired by the purchase to complete the Grand Slam when he defeated Rey Mysterio for the World Heavyweight Championship at The Great American Bash (2006). Booker has held the World Tag Team, Intercontinental, and Hardcore titles.
Following WrestleMania 31 in 2015, WWE established an updated version of the Grand Slam - consisting of the four currently active titles in WWE, which are the WWE World Heavyweight, Intercontinental, United States, and WWE Tag Team Championships.〔(New Grand Slam - WWE.com )〕 Six wrestlers have been recognized as Grand Slam winners under these new parameters (including three who were already recognized as Grand Slam winners under the original guidelines).
As of , 15 wrestlers have been recognized as WWE Grand Slam winners under its various incarnations.
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