June 26: Derek Jeter is born in 1974.
June 27: The first night game is played at Cleveland Stadium (1910).
June 28: The Polo Grounds open in Brooklyn (1911).
June 29: Willie Mays hits three home runs in one game (1961); Willie Stargell hits his 400th home run (1977); Dave Stewart and Fernando Valenzuela both throw no-hitters (1990).
June 30: Forbes Field opens in Pittsburgh (1909); Riverfront Stadium opens in Cincinnati, with Hank Aaron hitting the first run in the stadium (1970); Larry Doby becomes the first black manager for the Chicago White Sox and the second black manager in American League history (1977); Eddie Murray gets his 3,000th career home run (1995).
July 1: Walter Johnson throws his first no-hitter (1920); Roy Campanella makes his debut with Brooklyn (1948).
July 2: Bob Feller wins his 200th game (1950); Jose and Ozzie Canseco are born in 1964.