2018 World Series Champion Jackie Bradley Jr has autographed this official 2018 World Series baseball. 2018 World Series autographs are highly collectible and sought after. Don't miss out! Autograph is authenticated by PSA/DNA, the worldâ€s leading authenticator of sports autographs. Comes with their unique sticker # fixed to the item and verified on their website. Also, comes with their certificate of authenticity with same matching #. Comes with an Ultra Pro UV protective baseball display case!