You can't scout players you already have in your club, so the only way you get 3 copies of the same player is by spinning Agents. It's important to note that you cannot trade players for legends. This means that if you have 3 Messis, you can swap for any other Black Ball, like Ronaldo. You can trade 3 copies of the exact same player for a different player of the same rarity (level 1).
