Mike Singletary Autographed Chicago Bears Goal Line Art Card Black HOF 13237 This is a limited edition of 5000, Goal Line Art card which has been personally autographed by Mike Singletary 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 GT Sports Marketing Sports Card show on February 21, 2010 in San Jose, CA and includes a certificate of authenticity from Denver Autographs.