On july 1, 2000 On Canada’s 133rd birthday, Florida’s Ryan Dempster and Montreal’s Mike Johnson hook up in a rare matchup of Canadian starters. Dempster comes out on top as the Marlins defeat the Expos, 6 – 5. Johnson hails from Edmonton, Alberta, while Dempster is a native of Sechelt, British Columbia. Theirs is the first matchup of Canadian-born starters since last September when Dempster took on Eric Gagné of the Los Angeles Dodgers.
Source
Baseball Reference July 1