See pictures. He signed this with a sharpie.
Rare Derrick Thomas Single Signed Official Wilson NFL Football PSA
1990 Derrick Thomas Pro Set Values - MAVIN
Derrick Thomas #58 - Kansas City Chiefs - Limited Edition
Kansas City Chiefs Signed Publications & Media, Collectible Chiefs
This is a Football that has been hand signed by Derrick Thomas. This item has been certified authentic by Beckett Authentication (BAS) and comes with
Derrick Thomas Autographed Signed NFL Leather Football Chiefs Beckett #AC56673
Kansas City Chiefs - NFL Memorabilia
Rare Derrick Thomas Signed Wilson NFL Game Football Kansas City
Kansas City Chiefs Derrick Thomas Signed Autographed Possibly Game
Patrick Mahomes Autographed and Framed Kansas City Chiefs Jersey
1990 Derrick Thomas Pro Set Values - MAVIN
Derrick Thomas Autographed Memorabilia
Joe Theismann Autographed 83 MVP and Framed Maroon Redskins Jersey
6X AUTO JSA COA DERRICK THOMAS/NEIL SMITH/MARCUS