Featured is a Ken Griffey Jr and Ken Griifey Sr signed Louisville Slugger baseball bat; inscribed "Back To Back HRs 9/14/90". This bat has been hand signed and comes with the Beckett hologram and certificate of authenticity. This bat would make a great addition to any sports memorabilia collection!. SPECIFICATIONS Autographed By: Ken Griffey Jr Team: Seattle Mariners Sport: Baseball Authentication: Beckett Grading Services