1947 – A movement among Cardinal players to protest the first meeting with Jackie Robinson and the Dodgers is aborted by a clubhouse talk from owner Sam Breadon, according to a story by writer Stanley Woodward. League president Ford Frick had warned the team that if a strike occurred, any player involved would be suspended. Cardinal manager Eddie Dyer denies there was any strike talk. The Cards win, 5 – 1.

On May 8, 1947 — 1947 – A movement among Cardinal players to protest the first meeting with Jackie Robinson and the Dodgers is aborted by a clubhouse talk from owner Sam Breadon, according to a story by writer Stanley Woodward. League president Ford Frick had warned the team that if a strike occurred, any player involved would be suspended. Cardinal manager Eddie Dyer denies there was any strike talk. The Cards win, 5 – 1.

Source:
Baseball Reference May 8