The Canadian Baseball League, Canada's first professional baseball league, was an Independent minor league that operated in 2003. The league's only Commissioner was Major League Baseball star and Canadian Baseball Hall of Fame member Ferguson Jenkins.

The following teams played in the league, with their final win/loss record from the 2003 season:

West Division

East Division
  • London Monarchs (20-13)
  • Niagra Stars (15-15)
  • Trois Rivieres Saints (14-17)
  • Montreal Royales (10-22)

Due to poor attendance (an average of about 1500 people per game), the league only operated from May 21 to July 23 of 2003. There were also problems with the national television contract. The Jenkins Cup was awarded to the team with the best record (the Calgary Outlaws) after the All-Star Game in Calgary on July 23. The All-Star Game was won by the West Division, as the game was tied 5-5 after 10 innings, and the West had won the Home Run Derby.

The remaining assets of the League were auctioned off on December 1, 2003, in Vancouver, British Columbia.