My least favorite sport is baseball. ✓

Baseball game is something like bored.
corrections: Baseball game is boring.

Because baseball players throw and catch the ball.
corrections: Because baseball players just throw and catch the ball.

It has a little moment, but I don't like waiting moment. 
corrections: It has a waiting moment and I don't like waiting.

So baseball is my favorite sport.
corrections: That is why, baseball is my least favorite sport.