To dream that you are attending a baseball game signifies satisfaction and comfort of the mind.
If you are playing baseball, this suggests that you should set new goals and reach them. You must cease throwing away time and effort and think of a long-term vision. This dream could also have sexual undertones if you consider the terminology related to both: first base, second, etc. A baseball bat could represent male symbols and the ballpark could represent female aspects.
To dream of a baseball field being built, this represents unaddressed sexual problems.