1904 - The visiting Phillies stop the Giants win streak at 12 when the beat up Dummy Taylor to win, 9-8. Bill Duggleby is the victor. New York then wins the nitecap, 4-1 as Christy Mathewson notches his 30th victory, over Tully Sparks. Darkness ends the game in the 7th inning.
1908 - Christy Mathewson's 30th win is a gem-an 11-inning 1-0 win over the Superbas' Nap Rucker. A single by Al Bridwell drives home Cy Seymour with the winning tally. New York stays a half-game ahead of Pittsburgh. (Mathewson won 30 or more games four times in his career and from 1901-1914 won fewer than 20 games only once)
1952 - An umpire ejects Giants P Larry Jansen for throwing a beanball. Giants manager Leo Durocher is also suspended and fined $100. Jansen is fined just $25 because of his "excellent conduct record." Brooklyn splits the doubleheader, winning the opener 10-2 and losing the nightcap 3-2. The Dodger lead stays at 5 games. (seems like there was a lot of that in the fifties)
1965 - The Giants take over 1st place for the 1st time this season as reliever Masanori Murakami wins 3 - 1 in Los Angeles, CA, dropping the Dodgers to 2nd place by .002 percentage points. The Giants have now won four straight and will win their next 10. (the Dodgers went on to win the pennant in a tight race)
Thanks to baseball reference