Left-handed pitcher Rube Marquard of the Giants won 19 decisions in a row to start the 1912 season. This tied a single-season mark set by Tim Keefe in 1888 and remains a record that stands to this day. Marquard’s first loss of the season came on July 8th, when the Cubs defeated New York, 7-2. Marquard went on to win a total of 26 decisions for the season, helping the Giants on their way to winning the NL pennant.
On August 14, 1888, New York Giants pitcher Tim Keefe lost to Gus Krock and the White Stockings, 4-2, at the Polo Grounds. This defeat marked the end of a nineteen-game winning streak for Keefe. 1888 proved to be the Hall of Fame pitcher’s best year, as he posted a 35-12 record and a 1.74 ERA with 335 strikeouts, earning him the Triple Crown that season.