This baseball has been personally hand-signed by Mike Trout with the inscription "War Machine." It has been obtained under the auspices of the Major League Baseball Authentication Program and can be verified by its numbered hologram at MLB.com. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud. 100% Guaranteed Authentic. Features Tamper-Evident Steiner Hologram. Perfect Collector's Item. Includes certificate of authenticity and hologram! Trout's signature is guaranteed authentic through the MLB.com Authentication system.