Tim Keefe’s nineteen game winning streak ends when Gus Krock and the White Stockings defeat the Giants at the Polo Grounds, 4-2. The future Hall of Fame right-hander, who will amass 342 career victories, will finish the season with a 35-12 record.

On August 14, 1888 — Tim Keefe’s nineteen game winning streak ends when Gus Krock and the White Stockings defeat the Giants at the Polo Grounds, 4-2. The future Hall of Fame right-hander, who will amass 342 career victories, will finish the season with a 35-12 record.

Source:
Baseball Reference August 14
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game