He signed this with a sharpie.
Lot Detail - Derrick Thomas Signed Kansas City Chiefs Jersey (PSA/DNA)
KANSAS CITY CHIEFS DERRICK THOMAS SIGNED JERSEY JSA COA AUTHENTIC
Derrick Thomas NFL Memorabilia, Derrick Thomas Collectibles
DERRICK THOMAS SIGNED Photo Print Autograph Nfl Football Kansas
Products – SportAuthentix
Chicago Bulls Hall of Fame Authentics
Derrick Thomas Signed Chiefs Full-Size Authentic On-Field Helmet
Derrick Thomas Memorabilia, Autographed Derrick Thomas
Derrick Thomas Autographed Memorabilia