Sixteen of the most promising fighters in the nation arrived at their specially constructed Contender Gymnasium to live, train and fight. Each boxer had a different story, but all shared the same goal: to fight at Caesars Palace in Las Vegas for $1 million dollars and the chance to change their lives and the lives of their family in this boxing tournament.

Survival of the Fittest - Rivalries develop that test the team concept prior to the bout, which knocks out contender number 2.

Rivals - Before one contender is eliminated in the ring, all 14 must play a game of dodgeball.

The Enemy of My Enemy is My Friend - Najai Turpin takes on an opponent who has fought before on the series. But before the bout, there's fighting outside the ring.

In Round 5, Peter Manfredo, who lost his first pro bout in Round 1, returns to replace the ailing Jeff on the winless East team. But before the bouteven begins, an urban obstacle course in downtown L.A. in on the menu. But first, last week's winner, Sergio, and his West teammates celebrate with former light-heavyweight champion Antonio Tarver.

Round 6. The East goes for two in a row. But first, the prefight challenge involves a medicine ball on a very hot day.