If you think Tampa Bay Buccaneers linebacker Derrick Brooks has given up on playing football, it is time to change that thought.Brooks is still optimistic he can return to the NFL in 2010. Free agency does not begin on March 5, but Brooks hopes he can still be in the mix. After Tampa Bay released Brooks in 2009, the linebacker was unable to sign with any other team. New Orleans and Chicago showed interested in Brooks, but each went in different directions.