MLB Collectibles > Oakland Athletics > Helmets Jose Canseco Autographed Full Size Batting Helmet (oakland Athletics) - Jsa Coa! - Autographed MLB Helmets Mark McGwire Signed Oakland Athletics (A's) Replica Souvenir Batting Helmet Jacob Wilson Athletic's Autographed Replica Batting Helmet - Autographed MLB Helmets Reggie Jackson HOF 93 5x WS Champ Signed Authentic A’s Batting Helmet JSA - Autographed MLB Helmets Dennis Eckersley Oakland Athletics Autographed Alternate Chrome Rawlings Mini Batting Helmet with "HOF 04" Inscription - Fanatics Exclusive - Autographed MLB Helmet Jose Canseco Signed Oakland A's Replica Batting Helmet w/40-40 More Oakland Athletics Autographed Helmets