Michael Phelps' greatness was recognized by a Starbucks employee.
When he visited a location to get a cup of coffee with his wife and a friend, a barista wrote "The Goat" as in the "greatest of all time" on the cup.
His wife's cup said "Wife of Goat" and his friend's said "Friend of Goat."
Phelps earned 28 Olympic medals, 23 of them were gold.
