All facts are from http://www.todayinbaseballhistory.com.
July 17: Joe DiMaggio’s 56-game hitting streak is ended by the Cleveland Indians (1941); Bob Gibson became the second pitcher in MLB history to record 3,000 strikeouts (1974).
July 18: Ambidextrous Louisville pitcher Tony Mullane begins a game against Baltimore pitching right-handed, then switches to his left hand in the fourth inning (1882).
July 20: Brooklyn’s Dazzy Vance strikes out 17 in a 10-inning Dodgers win against Chicago (1925).
July 21: A 24-inning game between the Detroit Tigers and the Philadelphia Athletics ends in a 1-1 tie (1945); Hank Aaron hits his 700th home run (1973).
July 22: The Braves set a MLB record by using five pitchers in the ninth inning in a 5-4 win against St. Louis (1967).
July 23: Harry Stovey of Boston’s Players League team becomes the first player to reach 100 home runs (1890).