Michael Phelps is considered the greatest swimmer of all time. He won a total of 28 Olympic medals, including 23 gold medals, over his career competing in five Olympic Games from 2000 to 2016. Some key accomplishments include winning 8 gold medals at the 2008 Beijing Olympics, and breaking the record for most Olympic gold medals with 19 total at the 2012 London Olympics. Phelps' success was due to his immense dedication to training, practicing up to 6 hours a day, 6 days a week, and consuming over 12,000 calories per day to fuel his intense workouts. After retiring from swimming, Phelps has expressed interest in pursuing a career in professional golf.