Final answer:
The main character or protagonist in the short story 'Shoeless Joe Jackson Comes to Iowa' is Ray Kinsella, a farmer and baseball fan who is determined to build a baseball field in his cornfield.
Step-by-step explanation:
The main character or protagonist in the short story 'Shoeless Joe Jackson Comes to Iowa' is Ray Kinsella. Ray is a farmer and baseball fan who hears a mysterious voice telling him to build a baseball field in his cornfield. He becomes obsessed with fulfilling this vision and is willing to take risks to make it happen. The author describes Ray through his actions, thoughts, and interactions with other characters in the story.