Featured is a Ken Griffey Jr. signed Seattle Mariners Nike baseball jersey. This jersey has been hand signed by Griffey and comes with the JSA hologram. This jersey is size L. This jersey has been professionally framed and matted and is approximately 32x42. This jersey would make a great addition to any sports memorabilia collection.. SPECIFICATIONS Autographed By: Ken Griffey Jr. Team: Seattle Mariners Sport: Baseball Authentication: James Spence Authentication (JSA)