This listing is for an autographed Marks Brothers jersey. The autographs include Mark “super” Duper and Mark Clayton. The jersey has been authenticated by JSA (one of the best authentication companies). It has the tamper proof sticker/hologram and the certificate card. This jersey would be a great addition to any collection! I have a bunch of other autographed jerseys, helmets, and baseballs authenticated by TRISTAR, JSA, PSA/DNA, STEINER, SCHWARTZ, and LEAF.