A mind that is not under control is a mind that makes mistakes. Mistakes that could lose a game. Extreme stress causes a wild mind. Stress is a helpful tool when used correctly; when not used correctly, stress can cause you to lose a lot of games.
Meditation could be that extra edge that helps you win the game-winning point or helps you go the extra mile when you think you can't. Why not incorporate it into your training regime? It just might make you a better athlete.