Mack spent 8 years in the major leagues with the Cincinnati Reds, serving as major league pitching coach, bullpen coach and assistant pitching coach. Before his tenure in the major leagues, Mack was minor league pitching coordinator with the Reds for four seasons. Additionally, Mack spent another 24 years as a minor league pitching coach with the Reds. In 2019, he served in player development for the world champion, Washington Nationals, earning his second World Series Championship Ring. Before embarking on a coaching career, Mack was a minor league pitcher in the Cincinnati organization for 3 plus seasons. Mack is a proud father of two children, Corinne and Payton. His daughter Corinne pitched at Florida International University where she is second in all time victories. Payton, was also a college pitcher, toeing the rubber for Cincinnati Christian University.