Cal Ripken, Jr. PSA-Graded Gem Mint 10 Autograph on a Mint 9 OML Selig Baseball. Lot 379. Cal Ripken, Jr. PSA-Graded Gem Mint 10 Autograph on a Mint 9 OML Selig Baseball. Bold sweet spot signature on a ball that seems to have no obvious imperfections. A PSA-DNA Certificate of Authenticity is provided. Winning Bid $100. Back to List Winning Bid $100 Back to List