Tim S. Grover is an American performance coach, author, and speaker best known for training elite athletes such as Michael Jordan, Kobe Bryant, and Dwyane Wade. He is the author of Relentless and Winning, where he shares lessons on discipline, mental toughness, and the relentless pursuit of excellence. Grover’s work emphasizes building an uncompromising mindset, mastering pressure, and pushing beyond limits to achieve extraordinary success in sports, business, and life.