What is The Duke? History of the NFL's game ball
Understanding the Basics of American Football
What We Learned From Week 10 in the N.F.L. - The New York Times
The Wilson® NFL® Official Game Ball is handcrafted with exclusive leather for an exclusive feel that is as closest to in-game pro balls. Featuring
Wilson NFL “The Duke” 11'' Official Football
How It's Made: Anatomy of the NFL Schedule
Super Bowl footballs are made at Wilson factory in Ada, Ohio
Recalling Flacco before he made it big in NFL
Tom Brady's last touchdown ball sells for $518k at auction right before he announces NFL comeback
Why is a Football Called a Pigskin?
Ben Roethlisberger made the Steelers buy him a rugby ball to use in practice to make throwing a football easier