The most common sport anywhere in Mexico is soccer
It is the most widely played sport in Mexico.
The most common sport played in America is Football. Some may say basketball, golf, or baseball. But the most common sport played in America is Football!
Soccer is the most played.
This sport is played most in Brazil and Mexico!
It depends on what you define the most common sport in the Olympics as, football is probably the most played sport that is included in the Olympics