Here are the mistakes in each sentence:

1. **Sentence 1**: The mistake is in part **A**. It should be "wrong of you" instead of "wrong with you."

2. **Sentence 2**: The mistake is in part **B**. It should be "their" instead of "that." The correct phrase is "proud that their son."

3. **Sentence 3**: The mistake is in part **A**. It should be "park" instead of "park up." The expression is "called the baseball park."

So, the mistakes are A, B, and A respectively for each sentence.