In 2006, Fincher played in six games for the New Orleans Saints and recorded nine tackles.
Fincher played in seven games for the New Orleans Saints in 2007, recording three tackles. He was placed on injured reserve on November 4, 2007 due to a concussion, ending his season. He was waived from injured reserve on November 29. He has inspired his cousin Travis Fincher while playing for the 'SR Colts', during the 2007-08 season.
Detroit Lions
On March 27, 2008, Fincher was signed by the Detroit Lions. However, he was released on July 27 after linebacker Teddy Lehman was re-signed.
Washington Redskins
On July 31, 2008, Fincher was signed by the Washington Redskins. He re-signed with the Redskins on March 10, 2009. He was waived on August 30.