The Extreme Rules pay-per-view was introduced to the WWE Universe in 2009 and has a history of producing exciting and unforgettable matches. Prior to 2009, the PPV was named One Night Stand and had the Extreme Rules concept.
On May 19, the WWE will celebrate the five-year anniversary of Extreme Rules. For the past four years, the WWE has given fans some amazing matches and interesting stats.
These five facts have been t...
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