Featured is a Ronald Acuna Jr. Signed Atlanta Nike baseball jersey, inscribed “18 ROY”. This jersey has been hand signed by Acuna and comes with the JSA hologram and certificate of authenticity. This jersey is size XL. This jersey would make a great addition to any sports memorabilia collection. 100% Guaranteed Authentic Autographs. Sign up for our Sports Integrity Newsletter for deals and upcoming autograph signings! Sign up to receive special insider notifications of deals and upcoming autograph signings! Signed In Black Braves White Nike Baseball Jersey 18 ROY JSA. James Spence Authentication (JSA). Questions about this item? My about us text goes here. My authenticity guarantee text goes here.