Huge inventory of authentic autographed sports and entertainment memorabilia and collectibles. Jason Kelce Eagles Autographed/Inscribed Fat Batman Mask Helmet PSA/DNA. Offered is a Jason Kelce Philadelphia Eagles Autographed/Inscribed Batman Mask. This mask is authenticated by PSA/DNA and includes their Tamper-proof Sticker and Certificate of Authenticity. Questions about this item? We welcome any questions, concerns, or queries you may have. Best Authentics is a leading sports memorabilia and collectibles retailer located in South Central Pennsylvania. We have specialized in supplying quality authentic products to collectors for over 20 years and continue to update our inventory frequently with new and exciting items.