Before the start of the 1966 season, Sandy Koufax and Don Drysdale formed a two-man union and asked the Dodgers for three-year contracts worth $166,666 per year, as reported at the time by the Los Angeles Times.
The contract demands led the two pitchers, who formed the top of the Dodgers rotation, to threaten retirement and they sat out 32 days of spring camp before coming to an agreement on this date in 1966. During their holdout, they had signed an agreement to appear in a movie that would have cast Drysdale as a television commentator and Koufax as a detective.