On August 2, 1938 — Bright yellow baseballs designed by Frederick Rah, who believes the visibility of the dandelion-hue sphere will help players avoid getting hit by a pitch, are used in the first game of a doubleheader. The one-game experiment draws mixed reactions and the Dodgers complete their sweep of the twin bill from the Cardinals, 6-2 and 9-3, using the traditional white ball in the nightcap.
Source:
Baseball Reference August 2
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game