Originally Posted by
PTDAWG
Get a few balls and some sharpie pens (red, blue, green, black). Colors don't matter I guess, that's just what we used. Color each quadrant of the ball between the stitches a different color. Use these balls in batting practice. Every 5th or 6th pitch to each batter throw this ball (4-seam fastball works best). Have the batter (after hitting this ball) tell you what color he saw when he made contact. You will be surprised at how well it makes your batters actually track the ball and concentrate to determine the color. You won't know and sometimes they won't know what color was actually right but that's not the point.