Gary Zimmerman Autographed Denver Broncos Goal Line Art Card Blue HOF 13968 This is a limited edition of 5000, Goal Line Art card which has been personally autographed by Gary Zimmerman in blue sharpie. From the original done by Gary Thomas.This is mint with no smears and was signed at our retail store in Westminster, CO on October 4, 2008 and includes a certificate of authenticity from Denver Autographs.