At the major league’s annual summer meetings in Milwaukee, all of the American League owners vote “yes”, and all of the National League owners vote “no” on a proposal introducing interleague play for next season. Commissioner Bowie Kuhn, who favors a limited number of interleague contests, does not cast a vote of his own that could have potentially broken the impasse, citing the possibility of doing so at later date when the legality of his ballot, which is being challenged by the Senior Circuit, is resolved.

On August 16, 1973 — At the major league’s annual summer meetings in Milwaukee, all of the American League owners vote “yes”, and all of the National League owners vote “no” on a proposal introducing interleague play for next season. Commissioner Bowie Kuhn, who favors a limited number of interleague contests, does not cast a vote of his own that could have potentially broken the impasse, citing the possibility of doing so at later date when the legality of his ballot, which is being challenged by the Senior Circuit, is resolved.

Source:
Baseball Reference August 16
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game