Watertown’s Leo J. Martin was an outstanding amateur golfer in the 1930s and -40s, and died in World War II. A golf course in Weston was dedicated to him. In the late 1930s, a pair of twins from Watertown dominated amateur golf in Massachusetts, winning the state championship and other prestigious tournaments. The United States’ entry into World War II, however, put golf on pause and for one of the twins, Leo J. Martin, it was the end. He was killed in action.