Kevin Mitchell Steiner Authenticated Autographed MLB Baseball-Retired Mets brillant player Kevin Mitchell has personally hand-signed this MLB Baseball. In Amazin Peter Golenbocks oral history of the New York Mets Hall of Fame catcher Gary Carter said he gave Mitchell the nickname World for his ability to play in the infield and outfield. Carter spoke fondly of Mitchells talents. This Kevin Mitchell autograph is guaranteed authentic and includes a Steiner Sports Certificate of Authenticity and an accompanying tamper-evident Steiner Hologram. The Steiner Seal Means Its Real. It also features a Hologram from MLB Authentication.