The One Piece x MLB Art Card set is an unlicensed crossover that sits at an interesting intersection of two very different collecting worlds: the long-running Japanese manga and anime phenomenon of One Piece, and the American baseball tradition that has inspired generations of cardboard collecting. Mashups like this one circulated as fan-driven art pieces, and they are remembered for capturing the playful energy of collectors who love both the sport's visual language and the bold, colorful style of Eiichiro Oda's world. Because the set is unlicensed, it occupies a gray space in the hobby, which gives it a distinct identity among collectors who prize unusual, conversation-starting releases. Card 4 features Usopp, the crew's sharpshooter and storyteller, rendered in the familiar layout of a baseball card. Collectors often seek him for the character's recognizable slingshot and his signature long-nosed silhouette, which translate surprisingly well into a sports-card format. The pairing of a swashbuckling sniper with a ballpark aesthetic makes this card a favorite for fans of the character and for those drawn to crossover art.