Gary Zimmerman Autographed Denver Broncos Goal Line Art Card HOF Black 13967 This is a limited edition of 5000, Goal Line Art card which has been personally autographed by Gary Zimmerman with HOF inscription in black sharpie. From the original done by Gary Thomas, card measures 4x6 and is mint condition.This was signed at the Collectors Showcase of America sports card show in Chantilly VA on April 11, 2015 and includes a certificate of authenticity from Denver Autographs.