Jack McDowell Chicago White Sox 1992 Score Sidelines - Guitarist Autographed Card - Band Shot - Nice. This item comes with a certificate of authenticity from Autograph-Sports. Autographed. Comes fully certified with a Athletic Promotional Events certificate of authenticity. . If a product is unsigned or non game-used, a hologram will not be included. Jack McDowell memorabilia. Chicago White Sox memorabilia.