Thiago Silva (Pictures) is in talks with the UFC to fight Rashad Evans (Pictures) on May 24 in the UFC, sources close to the undefeated Brazilian fighter tell Sherdog.com.

The explosive light heavyweight has also decided to leave the Macaco Gold Team and Chute Boxe. A source close to Silva (12-0) revealed that the fighter was leaving for more than just better training conditions, but did not elaborate.

Silva, who most recently dispatched of Houston Alexander (Pictures) in the first round of their November bout at UFC 78, could be joining American Top Team, according to published reports.

However ATT leader Ricardo Liborio (Pictures) told Sherdog.com that Silva "isn't an ATT official member. He'll join the team on qualified terms to see if he fits into the team's concept and into the team's resolutions. If it's OK, he'll be an ATT member."

Silva, unbeaten in three UFC contests, would likely face his toughest test in the Octagon against Evans (11-0-1), the heavyweight winner on season two of "The Ultimate Fighter."