Folarin Balogun has been all over the headlines lately after his World Cup red card suspension was overturned before the United States took on Belgium in the Round of 16.Many of those stories refer to him as "Flo."It's a nickname of sorts, a simple one.It's also pretty cool -- sounding like the word "flow," it's certainly a good name for a smooth athlete.MORE: Singing Hey Jude as Bellingham sets epic World Cup recordWhy is Folarin Balogun called 'Flo'?There's really nothing complicated. While it switches the first two letters of his first name, it's more or less an easy, shortened version of his name.Balogun apparently began being called "Flo" when he was in the academy at Arsenal.It's actually not his preferred nickname, though.MORE: An airport decision changed everything for Folarin Balo