Baseball Greats Autographed Memorabilia. Check out this Baseball Greats Autographed Baseball With 9 Signatures Including Ty Cobb, Frank Home Run Baker, Joe DiMaggio & Gabby Hartnett - PSA/DNA Certified. This is a Baseball (Ted Williams Speed Ball) that has been hand signed by the 9 Baseball Greats. Signatures include Ty Cobb, Frank Home Run Baker, Joe DiMaggio, Gabby Hartnett, Frank Frisch, Will Harridge, Dazzy Vance and Warren Giles. It has been authenticated by PSA/DNA and comes with their sticker and matching full page certificate of authenticity. SportsCollectibles.com offers a wide selection of MLB collectibles. Product ships within 1-3 business days and ships free if your order is over $100. Buy with confidence as this Ty Cobb autograph has been authenticated.