Final answer:
Andy wants to write a letter to be read at the game in order to address racism, support the protesting players, and shame the racist fans.
Step-by-step explanation:
The details from the passage that show why Andy wants to write a letter to be read at the game are "only two days before the next game", "to satisfy the protesting players", and "and shame the racist fans". These details suggest that Andy wants to take action before the upcoming game to address racism and support the protesting players by writing a powerful letter to be read over the microphone. The limited time frame, the focus on satisfying the players, and the desire to shame racist fans all contribute to Andy's motivation.