Featured is an Art Mahaffey signed Philadelphia Phillies Sports Illustrated magazine cover photo. This cover was hand signed by Art Mahaffey and authenticated by Beckett authentication services. Included with the photo is a Beckett hologram and certificate of authentication. This photo would make a great addition to any sports memorabilia collection.. SPECIFICATIONS Autographed By: Art Mahaffey Team: Philadelphia Phillies Sport: Baseball-MLB Authentication: Becket Grading Services