SummerSlam (2004) was the seventeenth annual SummerSlam PPV. It was presented by Stacker 2's YJ Stinger and took place on August 15, 2004 at the Air Canada Centre in Toronto, Ontario and featured talent from the Raw and SmackDown! brands. The main match on the Raw brand was Chris Benoit versus Randy Orton for the World Heavyweight Championship. The predominant match on the SmackDown! brand was John "Bradshaw" Layfield (JBL) versus The Undertaker for the WWE Championship. The featured matches on the undercard included Kurt Angle versus Eddie Guerrero and Triple H versus Eugene.
| Actor | Role |
|---|---|
 Randy OrtonRandy Orton | Randy Orton |
 Chris BenoitChris Benoit | Chris Benoit |
 Mark CalawayThe Undertaker | The Undertaker |
 John LayfieldJBL | JBL |
 Paul LevesqueTriple H | Triple H |
 Ric FlairRic Flair | Ric Flair |
 Nick DinsmoreEugene | Eugene |
 Matthew WieseLuther Reigns | Luther Reigns |
 Kurt AngleKurt Angle | Kurt Angle |
 Eddie GuerreroEddie Guerrero | Eddie Guerrero |
 Dave BautistaBatista | Batista |
 Christopher IrvineChris Jericho | Chris Jericho |
 Adam CopelandEdge | Edge |
 John CenaJohn Cena | John Cena |
 Booker Huffman, Jr.Booker T | Booker T |
 Glenn JacobsKane | Kane |
 Matt HardyMatt Hardy | Matt Hardy |
 Amy DumasLita | Lita |
 Mark LoMonacoBubba Ray Dudley | Bubba Ray Dudley |
 Devon HughesD-Von Dudley | D-Von Dudley |
 Matt HysonSpike Dudley | Spike Dudley |
 Óscar Gutiérrez RubioRey Mysterio | Rey Mysterio |
 Peter Gruner Jr.Billy Kidman | Billy Kidman |
 Paul LondonPaul London | Paul London |
 Christy HemmeChristy Hemme | Christy Hemme |
 Patricia StratigeasTrish | Trish |