In the letter, Ford described in detail a game he witnessed on June 4, 1838—Militia Muster Day, played in Beachville, Ontario.

[6] Barney opined that following the American Revolution, settlers in Southwestern Ontario brought their recreational activities.

[3] Ted Spencer, curator of the National Baseball Hall of Fame and Museum, and historian Tom Heitz, noted that records exist of earlier bat and ball games played in the United States that evolved into baseball, and agreed that American settlers in Canada likely brought the game with them.

[9] Babe Ruth hit his first professional home run on Canadian soil on September 5, 1914, at the former Hanlan's Point Stadium on Centre Island in Toronto.

Ruth was playing for the Providence Grays against the Toronto Maple Leafs baseball team of the International League.

In Ken Burns' documentary film Baseball, the narrator quotes Sam Maltin, a stringer for the Pittsburgh Courier: "It was probably the only day in history that a black man ran from a white mob with love instead of lynching on its mind."

Following Robinson's breaching of the colour barrier, in the 1950s many other players from the declining Negro leagues travelled north to ply their trade in Canada, including Hall of Famers Leon Day, Satchel Paige and Willie Wells, who like many other African-American players competed in the Mandak League.

[12][13] In 1957, former Cincinnati Reds and Philadelphia Phillies outfielder Glen Gorbous, a native of Drumheller, Alberta set the current world record for longest throw of a baseball at 445 feet 10 inches (135.89 m) in Omaha, Nebraska.

The first Canadian in the National Baseball Hall of Fame was Ferguson Jenkins, a right-handed pitcher who compiled a 284–226 record, 3.34 ERA and 3,192 strikeouts in 19 seasons from 1965 to 1983 with the Philadelphia Phillies, Chicago Cubs, Texas Rangers, and Boston Red Sox.

Canada earned the bronze medal in the 2009 Baseball World Cup, their highest finish in the history of the competition.

After the Montreal Expos were relocated to Washington, D.C., only one Canadian team plays in Major League Baseball, the Toronto Blue Jays.

The Vancouver Canadians are presently affiliate of the Blue Jays, and play in the Northwest League at the High-A level.