Former Atlanta Braves pitcher John Smoltz is selling his $7.2 million estate, located on 19.7 acres in the gated Greystone community in Milton. According to the listing by Harry Norman Realtors, the 18,000-square-foot home includes 10 bedrooms, 10 bathrooms, an au pair suite, a studio apartment and an eight-car garage. The property also features a custom-designed 18-hole golf course, tennis and basketball courts, a pool and spa, baseball and football fields, a fishing pond and a jogging trail.