No.
You have two separate sentences which could be separated by a semicolon.
Q: There are two reasons why. I like baseball. It is fun. And good exercise.
A: There are two reasons why I like baseball, it is fun and good exercise.
Is this correct?
3 answers
There are two reasons why I like baseball; it is fun and good exercise.
Is that what you mean?
Is that what you mean?
Yes. It's now correct.