UFC 73: Stacked was a mixed martial arts (MMA) event held by the Ultimate Fighting Championship (UFC). It took place on July 7, 2007 at the ARCO Arena in Sacramento, California and featured a total of nine bouts: four on the preliminary card and five on the main card. The main event was Anderson Silva defending the UFC Middleweight Championship against Nathan Marquardt.

• Anderson Silva
• Nate Marquardt
• Tito Ortiz
• Rashad Evans
• Sean Sherk
• Hermes Franca
• Antonio Rodrigo Nogueira
• Heath Herring