Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. David Lutz (born December 30, 1959) is a former NFL offensive lineman who played thirteen seasons in the National Football League, mainly for the Kansas City Chiefs. American football is a sport played between two teams of eleven with the objective of scoring points by advancing the ball into the opposing team's end zone. Known in the United States simply as football, it may also be referred to informally as gridiron football.