James Horner's score is one of those near-perfect musical pieces that helps to define the movie. Even if it's your first time seeing this movie, you have heard the music before.
The score was one of the best original score nominees at the 1989 Oscars, but it lost to "The Little Mermaid". I'd honestly have to say it's a dead heat as to which one is the better score.
The following instrumental Score pieces were featured in Field Of Dreams: