July 10 – Harry Davis of the Philadelphia Athletics becomes the first player in American League history to hit for the cycle in a 13-6 victory over the Boston Americans. July 15 – New York Giants rookie pitcher Christy Mathewson pitches a no-hitter as the Giants beat the St. Louis Cardinals 5-0. July 23 – Fred Clarke of the Pittsburgh Pirates hits for the cycle in a 9-2 win over the Cincinnati Reds. July 24 - The playing career of Joe Quinn comes to an end after 17 years when he is released by the Washington Senators. July 30 – Philadelphia Athletics second-baseman Nap Lajoie hits for the cycle against the Cleveland Blues. Philadelphia defeats Cleveland, 11-5. August August 5 - In the second inning of the nightcap against the Boston Americans, Jimmy Hart of the Baltimore Orioles punches umpire John Haskell in the face. The rookie first baseman who hits .311 playing in a total of only 58 games in his major league career, serves a ten-day suspension, but quits after going 4-for-4 upon his return because the team refused to pay the $25 he had been fined. August 10 – Dale Gear of the Washington Senators sets an American League record by giving up 41 total bases as he loses 13-0 to the Philadelphia Athletics. The Athletics pitcher Snake Wiltse has two doubles and two triples, only the third time a pitcher has collected four extra base hits in a game. September September 1 - Days after his contract is sold by the Bridgeport Orators of the Connecticut State League to the Cincinnati Reds, Patsy Dougherty jumps from the NL to the AL's Boston Americans. September 3 – Joe McGinnity of the Baltimore Orioles collects two complete games in one day, beating the Milwaukee Brewers 10-0 and losing to them, 6-1. September 5 – The National Association of Professional Baseball Leagues, which would later become known as Minor League Baseball, was formed at a meeting of minor league executives at the Leland Hotel in Chicago. Patrick T. Powers, president of the Eastern League, became the first president of the NAPBL. September 19 – All games are cancelled due to the recent death of President William McKinley. September 21 – Though the Chicago White Stockings lose to the Philadelphia Athletics 10-4, they clinch the first pennant of the American League as the Detroit Tigers beat the Boston Americans 3-1.