Gale Sayers (HoF) Autograph on a 10” x 13” Magazine Ad Promoting “Sports Illustrated.” Lot 147. Gale Sayers (HoF) Autograph on a 10” x 13” Magazine Ad Promoting “Sports Illustrated.” Large, bold mint 9 signature authenticated by Kevin Keating. Winning Bid $20. Back to List Winning Bid $20 Back to List