baseball
The word 'Baseball' translates as 'Base-ball' in French. It is used exactly as in English to represent the popular sport. However, note that the French write it with a hyphen in between.
I like to play baseball during the summer.
This is a simple sentence expressing a personal preference for an activity, in this case baseball, that the speaker likes to do during a particular time of the year, in this case, summer.
Baseball is an extremely popular sport in the United States.
This sentence is stating a generally accepted fact about the popularity of baseball in the United States. It uses the superlative 'extremely' to emphasize the degree of popularity.
He hits the ball with his baseball bat.
This sentence describes an action that's happening, where a male person is striking a ball with a piece of sports equipment associated with the game of baseball - a baseball bat.