MLB: April 21st

Major League Baseball (MLB) is a professional baseball organization and the oldest major professional sports league in the world. As of 2022, a total of 30 teams play in Major League Baseball—15 teams in the National League (NL) and 15 in the American League (AL)—with 29 in the United States and 1 in Canada. The 2022 Major League Baseball season began on April 7 with the regular season scheduled to end on October 5.