Final answer:
The protagonist's specific fear related to Joe Jackson appearing on the field is not detailed in the provided excerpts. The themes in these excerpts suggest a general sense of fear about consequences, survival, or the unknown, which could apply to the protagonist's experience.
Step-by-step explanation:
In the short story "Shoeless Joe Jackson Comes to Iowa," the protagonist's fear when Joe Jackson appears is never explicitly stated. The quotes provided, however, depict various characters grappling with feelings of fear, anticipation, and uncertainty in different scenarios. For instance, a character experiences a fear of death and a desperate need for survival in a harsh winter scenario. Another snippet describes a character's fear and helplessness in the face of an unknown threat, while a third character is hugging the shadow of a tree out of fear of being discovered. In each case, there is a palpable tension and concern over what the future may hold or what the consequences of certain actions might be.
If we are to apply these themes to the protagonist in "Shoeless Joe Jackson Comes to Iowa," it could be surmised that the protagonist might fear the unexpected consequences of Joe Jackson’s appearance on the field, sports-related scandals like the Black Sox Scandal, or they might experience a dread of disbelief, skepticism from others, or even personal disillusionment. However, without a direct quote from this specific story, the fear is open to interpretation based on the themes found in these other excerpts.