Major League Baseball (MLB) is the highest level of professional baseball in the United States and Canada. It’s the oldest of the four major North American professional sports leagues.

Key points:
Formation: While its roots trace back to the 1800s, the MLB officially formed in 1903 with the merger of the National League (NL) and the American League (AL).
Structure:
Composed of 30 teams: 15 in the American League and 15 in the National League.
29 teams are based in the United States, and one (Toronto Blue Jays) is in Canada.
Season:
Runs from early April to late September.
Followed by playoffs and the World Series.
Global Reach: Despite being primarily a North American sport, baseball has a significant global following, with players from various countries and international fans.
Cultural Impact: MLB has a rich history and tradition, deeply ingrained in American culture. It has influenced language, fashion, and popular culture.