Not authenticated because the original owner cannot go to usa to do it, he is a 75 years old friend of mine who receive the sign by the player in almost all the cases, very trustable person, but if you want to authenticate the baseball and is not, you just can have your money back.
some baseballs:
Mickey Mantle
Ted Williams
Ozzy Smith
Joe Morgan
Aurelio Rodriguez
etc
also some rookie cards:
Jeter
McGwire
Sosa
B Bonds
Schilling
R. Johnson
Frank Thomas
Pedro Martinez at San Antonio
Mussina
Glavine
Maddux
R. Clemens
P. Rose
Smoltz
etc....