Aaron Donald Signed Autographed Pittsburgh Panthers 8x10 Photo. This licensed Photo has been signed by Aaron Donald. The autograph has been certified authentic by Sports Collectibles and comes with their authentication sticker and matching certificate of authenticity that can be verified online. Sports Collectibles is the leading third-party authenticator in the autograph industry. This signed Photo is a great gift idea for any Pittsburgh Panthers fan or memorabilia collector. Commemorate the great career of Aaron Donald with this Photo and check out other memorabilia at sportscollectibles.com.