 Mitchell worked out for the Kansas City Chiefs on June 6 , 2005 , following his release from the Eagles . He signed with the Chiefs on June 17 after Az @-@ Zahir Hakim decided against signing with the team . Mitchell did not receive a signing bonus . He began practicing with the team on the last day of mini @-@ camps , June 18 , and received extra practice with the coaches the following week . He suffered a knee injury during practice on July 30 and was scheduled to undergo arthroscopic surgery the following week , but declined to go through with it . He was released on September 2 due to concerns about his knee . Mitchell elected to have knee surgery on September 6 following his release . 
