On August 4, 1928 — A visiting team from Stanford University led by Harry Wolter plays the Australian national team in front of 15,000 spectators at the Agricultural Ground in Sydney, New South Wales. This marks the first time the national team has played an opponent from outside the country.

Source:
Baseball Reference August 4
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game