Ryan Clark autographed footballs are a must have for any Pittsburgh Steelers fan or memorabilia collector. Display this Ryan Clark Pittsburgh Steelers Autographed Wilson NFL Super Grip Football - Certified Authentic proudly in your home, office or Pittsburgh Steelers memorabilia man cave. This Ryan Clark signature has been authenticated by Seller and will come complete with a Certificate of Authenticity (COA) and matching tamper-evident sticker. Sports Collectibles is the online leader in authentic Ryan Clark signed memorabilia. Official NFL Sized Football. Multi-layered lining for consistent shape and durability. Ships inflated. Start your Pittsburgh Steelers signed football collection off right with an authentic Ryan Clark autograph. Item ships same day.