How do they work?
They are where the Perfect/perfect hits come from. Top dot P/P flyball Middle dot P/P liner bottom dot P/P ground ball. Size of the dots depend on attributes
The bigger the dot, the bigger the sweet spot. A dot at the top would be for Fly Balls, in the middle would be line drives, and at the bottom would be ground balls. So a Joey Gallo(in theory, I've never used a Gallo card). would have the biggest dot at the top