Guy Bush of the Chicago Cubs and Charlie Robertson of the Boston Braves battle for 18 innings before Robertson tires and the Cubs win, 7 – 2. Jimmy Cooney drives in the winning run and Sparky Adams contributes with four hits. Bush goes 18 innings and Robertson 17 1/3. Two National League pitchers, Carl Hubbell in 1933 and Vern Law in 1955, will match Bush’s marathon effort.

On May 14, 1927 — Guy Bush of the Chicago Cubs and Charlie Robertson of the Boston Braves battle for 18 innings before Robertson tires and the Cubs win, 7 – 2. Jimmy Cooney drives in the winning run and Sparky Adams contributes with four hits. Bush goes 18 innings and Robertson 17 1/3. Two National League pitchers, Carl Hubbell in 1933 and Vern Law in 1955, will match Bush’s marathon effort.

Source:
Baseball Reference May 14