Authentic Major League Signed Baseball by Detroit Tiger's 3rd Baseman Carlos Guillen!  This is a hologram certifieded MLB.

The Major League Baseball Authentication Program has set the standard for sports memorabilia authentication. Major League Baseball is the first and only professional sports league to implement a program that easily distinguishes authenticated autographs and game-used memorabilia from other items on the market.

This program - which combines the services of a third-party authenticator with a state-of-the-art hologram, a serial numbering system and an online verification process - guarantees the authenticity of its autographed and game-used items.