Mac was only 11 weeks old when Dr. John Lamberti of San Diego Children's Hospital performed open heart surgery on her. This was one of two open heart surgeries the second performed when MacKinzie was 23 months old. The Kline's were overjoyed their daughter would survive surgery, but doctors said Mac would never be like “normal” children or be able to participate in sports, especially any aerobic activities. This challenge did not stop the Klines from looking for ways to expand Mac's horizons. They figured they would find less physically stressful things she could participate in; hence, golf. The doctors were right, she is definitely not normal.