Tennessee Titans defensive end Dave Ball says he briefly considered retirement after his latest concussion two weeks ago against Cincinnati. Ball returned to practice Friday, but won't play against the Atlanta Falcons on Sunday because of his third concussion the past two seasons. His season ended after 11 games last year due to a concussion. Read more: http://espn.go.com/nfl/story/_/id/7...-ball-considered-retirement-latest-concussion