WEC 13: Heavyweight Explosion was a mixed martial arts event promoted by World Extreme Cagefighting on January 22nd, 2005 at the Tachi Palace Hotel & Casino in Lemoore, California. The card featured a 4 man Heavyweight Tournament featuring Brandon Vera as well as single fights which saw the likes of Jason "The Punisher" Lambert, Brad Imes, and MMA legend "Mr. International" Shonie Carter compete.
| Actor | Role |
|---|---|
| DDan ChristisonSelf | Self |
| AAndre RobertsSelf | Self |
 Jason LambertSelf | Self |
| RRichard MontoyaSelf | Self |
 Brad ImesSelf | Self |
| LLace PeleSelf | Self |
| JJorge OliveiraSelf | Self |
 Shonie CarterSelf | Self |
 Olaf AlfonsoSelf | Self |
| CChin SengSelf | Self |
 Brandon VeraSelf | Self |
 Mike WhiteheadSelf | Self |
| AAllan WeickertSelf | Self |
| JJeremy FreitagSelf | Self |
| TTerroll DeesSelf | Self |
| AAndre MussiSelf | Self |
| JJody PoffSelf | Self |
| HHoussain OushaniSelf | Self |
| VVan PalacioSelf | Self |
| FFred DiazSelf | Self |