Things You'll Need
Instructions
Clean your hands and the ball with a non-abrasive cleanser. Thoroughly dry the ball with a clean cloth.
Ask the baseball player to sign the ball in the “sweet spot” (the narrow space between the lines on the ball) with a high-quality ink pen. Avoid using permanent markers; they tend to fade over time. Ink pens last longer.
Place the ball into a baseball display case that has UV-protected glass. Keep the ball out of direct sunlight. Avoid handling the ball. Keep the ball in a room with moderate humidity and temperature (avoid extremes in heat and cold).