Aaron Altherr New York Mets Autographed Official Major League Baseball Signed OML baseball from New York Mets star Aaron Altherr - includes Dynasty Sports certificate of authenticity This baseball has been signed by New York Mets star Aaron Altherr. All autographed memorabilia comes with a certificate of authenticity and matching hologram. Hand-Signed by New York Mets star Aaron Altherr Signature is in bold blue on the baseball Official MLB Baseball Authenticated with Dynasty Sports serially numbered hologram and certificate during public autograph signing - guaranteed to pass JSA or PSA/DNA authentication