We all like to hit high pitches that float like a butterfly and stop on a dime, but you're better off hitting lower shots where you can control trajectory and get the ball to bite hard once it lands.

From carnivals, boardwalks, county fairs and street corners across the U.S. the glib salesmen known as “pitchmen” were rushing into television. In the New York area alone, TV pitchmen expect to reap a ...