Celebrate the dominance of one of the NFL’s most feared secondaries with this Autographed Alternate Flash Riddell Authentic Full Size Speed Proline Helmet, personally signed by Earl Thomas of the Seattle Seahawks. Featuring the iconic inscription "Legion of Boom", this collector’s piece captures the spirit of the Seattle Seahawks’ legendary defensive era—famed for its hard hits, tight coverage, and Super Bowl XLVIII victory. A must-have for Seahawks fans and NFL memorabilia collectors, this full-size helmet blends striking design with authentic, witnessed signatures that make it truly one of a kind.

This memorabilia item is part of the BAS Witnessed Protection Program, ensuring its authenticity with a tamper-proof, scannable Beckett Authentication Services (BAS) hologram sticker. Beckett representatives were present to witness the signing, giving added confidence to collectors. Please note: Beckett no longer provides serial-numbered COA cards—the affixed BAS sticker with QR code is your official certificate of authenticity.

• Signed by Earl Thomas – Seattle Seahawks star and key figure in the Legion of Boom.
• Features “Legion of Boom” inscription – paying tribute to the legendary Seahawks defense.
• Authentic Riddell Full Size Speed Proline Helmet – Alternate Flash edition for standout display appeal.
• Beckett Witnessed Authentication – hologram sticker with QR code for instant legitimacy verification.
• Limited inventory – each helmet is hand signed; signature placement and strength may vary slightly, making each piece unique.

Whether you're a lifelong Seattle Seahawks fan or an NFL history enthusiast, this Earl Thomas autographed helmet offers a high-impact addition to your collection. Showcase your passion for defense, dominance, and championship football with a true symbol of Seahawks greatness.