I don't think he ever did
According to the Ascart Park Polo Club website in England, "Polo is thought to have originated in China and Persia around 2,000 years ago. The name of the game may well come from the word 'pholo' meaning 'ball' or 'ballgame' in the Balti language of Tibet." (http://www.polo.co.uk/polo_history.htm)
He didn't find america. Marco Polo is the one who influenced Columbus to become an explorer.
(Assuming your question originates from America), it is called the Polo. If you are located in Europe, it is called the Polo in the rest of the world. An AMAZING car we will never get in America.
Polo never came to North America and was only in China. He did not claim land.
The longest polo game was played in America in the year of 2010
Water polo was first played in the USA in 1888
If you mean the Ralph Lauren Polo brand, I believe it comes from the game of polo, I think he played polo or something. Don't think Marco Polo had much to do with it.
A shorter route to America
Water Polo
Venice
Germany