Have some fun with your favorite NFL team with the Masterpieces Puzzle Co. San Francisco 49ers Playing Cards. This fun San Francisco 49ers fan gear is the perfect way to cheer on your team while you enjoy a little downtime. Whether you’re building the ultimate San Francisco 49ers fan cave or want to add some team spirit to your room, everyone will know who you root for with the Masterpieces Puzzle Co. San Francisco 49ers Playing Cards.