According to the website HowManyOfMe, there are 438,951 people in the United States with the first name Brandon. 99.3% of those individuals are male, and it’s the 142nd most popular name.
Put another way, if you were to meet a random man on the street in the U.S., there is an 0.3% chance his name is Brandon. If you were to meet a random man who happens to play for the San Francisco Giants, however, there would be a 7.7% chance his name was Brandon. You are 25 times more likely to find a Brandon on the San Francisco Giants than you are anywhere else in America.