I recently found a baseball that I caught at a Baltimore Orioles game and was looking for a unique way to display it. I found a 3D scan of a hand from @ryan5sampson and mashed and reshaped it so that it can hold a baseball. This can actually fit other balls up to 75mm in diameter.
There are 3 pieces: The Base, The Customizable Card, and the Hand Topper
Take the Base and insert the Customizable Card of your choice.
Screw the Hand Topper to the Base. (Start by going counter-clockwise until it drops in & then finish screwing clockwise)
Carefully slide in the baseball. Twist and rotate slowly until drops into place. (Again - this can actually fit other balls up to 75mm in diameter)
=== Additional Information ===
The Customizable Card has the Orioles logo on it, but you can put any logo or text you want. The main card is 1mm thick and the logo/text is set to be 0.4mm. Just place your logo or text just above the 1mm main card.
When selecting the filament for your skin tone, matte finish looks best.
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Other models available at: Bre3Dlove.com