- This is 2009 WS baseball has been personally hand-signed by New York Yankees star Mark Teixeira. Steiner Sports is the Exclusive Memorabilia Provider of Mark Teixeira.Inscribed 09 WS ChampsMLB Authenticated100% Guaranteed Authentic. Includes Steiner Sports Certificate of Authenticity. Features Tamper-Evident Steiner Hologram
Be the first to review this product.