July 15, 1901
Christy Mathewson becomes the first rookie to throw a no-hitter in baseball history in the modern era. The 20-year old right-hander holds the Cardinals hitless in the Giants 5-0 victory at Robison Field in St. Louis.(Nationalpastime.com)

July 15, 1939
National League president Ford Frick orders two-foot screens affixed inside all foul poles after Billy Jurges of the Giants and umpire George Magerkurth spit at each other after a foul ball call down the left field line is disputed at the Polo Grounds. The American League will soon follow the Senior Circuit lead and will also install foul ball screens.(Nationalpastime.com)