Major League Baseball pitchers

摘要

Can't wear white gloves or wristbands because they obscure the ball, making it difficult for batters to gauge a pitch's path. Professional table-tennis players aren't allowed to wear clothes that match the ball for similar reasons, but there are no such rules in tennis. A few years ago, optometrist Nick Dash, the chief scientific officer at the British company Sports Vision Institute, noticed that tennis pros were increasingly favoring bright yellow shirts, rackets and strings.